Series : DAYTONA
Model Number : 116520
Movement : Automatic
Power Reserve : Caliber Rolex 4130
Case Diameter : 40mm
Factory : Clean Factory / VSF(VS Factory)
Mirror Material : Resistant Sapphire Crystal
Dial Colour : Black
Strap Colour : Silver
Strap Material : Stainless Steel
Clasp : Folding Clasp
Annual-Calendar Setting Sequence: Independent Evidence
Start 116520’s annual-calendar setting sequence study with a verified same-generation example. Limit the comparison to the parts of the Black, 40mm case and Stainless Steel that actually influence annual-calendar setting sequence; adjacent Rolex references are background only. On 116520, sample more than one displayed calendar value before deciding whether annual-calendar setting sequence is consistent.
Bezel Relief
116520’s bezel relief is best judged three-dimensionally. Use front, side or oblique evidence as needed to understand mass and interface geometry, while keeping polishing history outside the initial comparison. On 116520, bezel evidence for bezel relief becomes clearer when registration and component height are considered together.
Fluted-Bezel Facet Consistency as a Reference Question
Mechanical evidence for 116520 should include fluted-bezel facet consistency where relevant. Compare operating sequence, response and architecture together so one successful function is not overinterpreted. For 116520, compare fluted-bezel facet consistency through stable geometry first and lighting-sensitive surface appearance second.
Examining Provenance Boundary
For 116520, image quality determines how much weight provenance boundary deserves. If angle, compression or white balance obscures the detail, the correct next step is a better targeted photograph rather than a stronger claim. Keep provenance boundary as a separate evidence channel for 116520; it should not absorb unrelated provenance or documentation claims.
Caseback-To-Midcase Transition: Independent Evidence
QC communities frequently discuss caseback-to-midcase transition, making it a useful question for 116520. Use that discussion to decide what to inspect, then return to a genuine same-reference baseline for the answer. For 116520, use the 40mm specification only as a broad anchor when assessing caseback-to-midcase transition from photographs.


















Chris Martinez –
After comparing a few similar pieces, this was the one I preferred. The proportions and black dial and 40mm case work particularly well together. So far the fit is comfortable, and the piece doesn’t feel difficult to wear for longer periods. I’m glad I took the time to compare the options.