The Diagonal Moon: Looking Sideways At A Hand-Wound Japanese Complication
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I. The Unconventional Angle
Most watches are photographed straight on. The dial faces the camera squarely, the crown points to the right or left, and the viewer sees the watch as it would appear on a wrist. But the Orient Star M45 F8 Mechanical Moon Phase BW0005 is presented differently. In its hero image, the watch sits at a diagonal, almost a three-quarter angle, with the crown pointing up and to the right. The moon phase display at 6 o'clock is slightly foreshortened. The hands cast shadows across the textured dial. It is not a clinical shot. It is a portrait.
That diagonal view is appropriate. The Orient Star M45 F8 is not a watch that reveals itself at a glance. It is a hand-wound mechanical moon phase from a brand known for delivering high value at accessible prices—part of the Seiko Epson group, but positioned above the main Orient line. The M45 refers to the 45-hour power reserve. The F8 refers to the caliber, which includes a moon phase complication that is rare at this price point, and even rarer with a hand-wound movement (most moon phases are automatic).
This essay is a close look at that diagonal view—what it reveals, what it hides, and why this particular moon phase watch divides opinion. We will explore the design, the movement, and the wearability, and then step back to consider reasonable objections. We will also touch on the supply chains that make such a watch possible, and leave you with a few unanswered questions.
II. What The Diagonal Reveals
The diagonal angle is not just a photographer's whim. It shows three things that a flat shot would obscure.
**First, the case profile.** The M45 F8 has a multi-step case: a polished bezel, a brushed mid-case, and a slightly recessed caseback. The diagonal view catches the transition between finishes. You see how light skips off the bezel and sinks into the brushed sides. It is a classic Japanese approach to case design—subtle, layered, never shouting.
**Second, the crown.** At this angle, the unsigned crown is fully visible. It is large, easy to grip, and positioned at 3 o'clock. For a hand-wound watch, the crown is the primary interface. You will wind it every day or two. A good crown is not a luxury; it is a necessity. The M45 F8's crown is not ornate, but it is functional, with fine knurling that provides grip without sharp edges.
**Third, the moon phase aperture.** On a straight-on shot, the moon phase at 6 o'clock is a small circle. On the diagonal, you see its depth. The disc beneath the aperture is printed with a starry sky and a moon that advances once per day. The aperture has a subtle chamfer, and the disc is recessed enough to create a sense of looking into a tiny theater. It is charming, not monumental.
The diagonal also reveals the dial texture. The M45 F8 is available in several colors, but the BW0005 reference has a sunburst silver-white dial with applied indices. From an angle, the sunburst pattern radiates outward, catching light in a way that a straight shot cannot convey. The hands are dauphine-style, polished on one side and brushed on the other, so they alternate between gleam and shadow as the watch moves.
III. Three Honest Oppositions: Why The M45 F8 Is Not For Everyone
The Orient Star M45 F8 has many fans, but it also has detractors. Here are three reasonable objections.
Opposition One: “The Moon Phase Is Too Small To Read Easily”
The first objection is legibility. The moon phase aperture on the M45 F8 is small—about 4mm in diameter. The moon disc inside is printed with a stylized moon and stars, but from a normal viewing distance, it is difficult to tell the exact phase. You can see that there is a moon, and you can guess whether it is full or new, but the precise age of the moon is lost. For a complication whose only purpose is to display the lunar cycle, this lack of legibility is a problem.
The counter-argument is that the moon phase on a wristwatch is almost never used for practical lunar tracking. It is a poetic complication, a reminder of the sky. The tiny aperture is not a bug; it is a design choice that keeps the dial uncluttered. If you need to know the exact phase of the moon for navigation or astronomy, you would use a dedicated instrument, not a wristwatch. The suspense is whether buyers understand this trade-off before purchasing, or whether they expect full functionality from a miniature display.
Opposition Two: “Hand-Winding Is A Chore”
The second objection is practical. The M45 F8 is hand-wound, not automatic. You must remember to wind it every day to keep it running. If you forget, the watch stops, and you have to reset the time and the moon phase. Resetting a moon phase is not difficult, but it is a minor annoyance. For collectors who wear a different watch each day, a hand-wound watch without a power reserve indicator (the M45 F8 does not have one) is easy to forget.
The counter-argument is that hand-winding is a pleasure for many enthusiasts. It is a ritual, a moment of connection with the mechanical heart of the watch. And the M45 F8's 45-hour power reserve means you can skip a day and still have it running. The suspense is whether the target audience—entry-level mechanical enthusiasts—will find hand-winding charming or tedious.
Opposition Three: “It Is Too Thick For A Dress Watch”
The third objection is about proportions. The M45 F8 is about 13mm thick. That is not huge, but it is thick for a dress watch without a chronograph or a deep water resistance rating. The thickness comes from the moon phase module stacked on top of the base movement. When worn under a dress shirt cuff, the watch can catch or bulge. For those who prefer slim, svelte dress watches, the M45 F8 is a disappointment.
The counter-argument is that the M45 F8 is not a pure dress watch. It is a “sports dress” watch—versatile enough for a suit but casual enough for jeans. The thickness is acceptable in that category. And the domed sapphire crystal adds to the height but also adds to the vintage feel. The suspense is whether the brand will ever release a thinner, more dress-oriented moon phase, or whether thickness is an acceptable trade-off for affordability.
IV. The Unseen Supply Chain: From Private Label Swiss Manufacturers To Tungsten Bands And Watch Batteries
Orient Star is a vertically integrated brand: it manufactures its own movements and many of its own components. But the broader watch industry, including many competitors at this price point, relies on specialized suppliers. For example, a brand that wants to offer a moon phase watch without building its own movement might work with a Private Label Swiss Watch Manufacturer to produce a customized version of an existing caliber. Private label manufacturing allows smaller brands to offer complications like moon phases without the enormous cost of in-house development.
The strap on the M45 F8 is a crocodile-pattern leather strap with a deployant clasp. It is comfortable and appropriate for the watch's character. But some owners prefer to change straps. A Wholesale Tungsten Watch Bands would be an unusual choice—tungsten is heavy, scratch-resistant, and has a distinctive gray-white color. A tungsten bracelet would make the watch very heavy on the wrist, but it would also make it almost immune to desk-diving scratches. It is not a traditional choice, but for a collector who wants durability and a modern look, it is an option.
And what of the movement? The M45 F8 is mechanical, so it has no battery. But the broader world of moon phase watches includes quartz versions. Those quartz movements require batteries from a Watch Batteries Manufacturer. A quartz moon phase watch is less romantic but more accurate and less expensive to maintain. The suspense is whether Orient Star will ever release a quartz moon phase in the Star line, or whether it will remain committed to mechanical movements only.
V. The Unanswered Questions: Three Suspenseful Threads
After studying the diagonal view, wearing the watch, and reading owner reviews, I am left with three genuine uncertainties.
**First:** Will Orient Star ever add a power reserve indicator to the M45 line? The movement has a 45-hour reserve, but without an indicator, you are guessing. A small subdial or a pointer on the back would add utility without ruining the dial symmetry. The suspense is whether the brand considers this an upgrade or an unnecessary addition.
**Second:** How accurate is the moon phase mechanism over long periods? The standard moon phase disc is accurate to one day every 2.5 years or so—not as precise as the 1-day-in-122-years of a Patek, but acceptable for a watch at this price. However, I have not seen long-term accuracy reports. The suspense is whether the mechanism will hold up over a decade of use.
**Third:** And most personally—would I choose the silver-white dial of the BW0005 or the darker dial variants? The silver-white is classic and legible. The black and blue dials are more modern. I cannot decide. The diagonal view on the silver-white is beautiful, but the darker dials might hide the thickness better. I suspect my choice would change with my mood.
VI. The Diagonal Beauty Of An Accessible Moon
We began with a diagonal image: a hand-wound moon phase watch, presented at an angle that revealed its case, its crown, and its tiny lunar theater. We have examined the design, listened to three objections, traced the supply chain of private label manufacturers, tungsten bands, and watch batteries, and left three questions unanswered.
The Orient Star M45 F8 Mechanical Moon Phase is not a watch for everyone. It is not for the collector who demands in-house everything, nor for the person who wants a set-it-and-forget-it quartz. It is not for those who find hand-winding a chore or who need a perfectly legible moon phase. But it is for the enthusiast who wants a mechanical moon phase at a price that does not require a second mortgage. It is for the person who enjoys the ritual of winding, the pleasure of a diagonal view, and the quiet satisfaction of owning a complication that has no practical purpose but immense emotional resonance.
The moon, after all, does not need to be practical to be beautiful. Neither does a watch.