The full collector review — case analysis, movement details, finishing grade, market positioning, and sourcing reference — is below. Each section is worth reading for this reference.
A review of the Omega Super Series Moon Dark Face  reference number 431 that is useful to a serious buyer needs to go beyond the specification sheet — the spec is the same across every example of this reference, but the execution quality varies considerably. This breakdown focuses on what distinguishes a good example from an average one.
The 41mm case is built in stainless steel, following the original reference geometry across lug width, case band, and crown placement without the dimensional shortcuts that lower-tier production accepts.
The Cal. 9300 drives the moonphase display — disc printing accuracy, aperture border definition, and display alignment are the criteria that determine whether this complication reads as a precision execution or an approximation. On this build those criteria have been assessed before listing.
The 60-hour power reserve covers a full working week without wear — genuinely useful for someone who rotates between pieces and does not want to wind or reset on every return to this watch.
The 50m water resistance rating handles rain and incidental water contact reliably — suited to the daily wear conditions the watch will actually encounter.
The steel bracelet follows the dimensional proportions and surface finishing of the genuine reference — the details that affect both how the watch looks from a distance and how it feels across the wrist in extended daily wear.
Buyers who have considered both the Co-Axial and standard automatic versions of this reference will find the movement regulation standard higher on the Co-Axial build — the escapement architecture genuinely affects long-term rate consistency.
Who This Reference Suits
This piece is built for the buyer who has already made their decision about this reference and is looking for confirmation that a specific example is worth acquiring. The build quality notes above should provide that confirmation — this is a well-sourced example of a reference that consistently attracts the right kind of collector attention.
Market Context
Higher-grade sourced examples of this reference generally circulate in the $726–926 range among informed buyers. Well-sourced examples of this reference circulate at this tier of the collector market — the positioning reflects the movement specification, finishing quality, and overall build standard rather than the brand name alone. This figure is a market reference estimate for research purposes — ARFWatches does not sell or transact products directly.
For real-time production updates and sourcing notes on this reference, ARFWatches maintains the most active collector discussion for this build tier.
Editorial Disclaimer: ARFWatches.com is an independent watch review and collector research platform. This page does not constitute an offer to sell any product. All market pricing figures are editorial estimates based on collector community data. Readers are responsible for ensuring compliance with the laws of their jurisdiction.