Vendome Case Numbers
The OP65xx numbers on the back of every Vendôme Panerai are a bit of a mystery.
I've heard it suggested that these are designators for the case used. But then I've also heard it suggested that they might also be a designator for the product lots or the designator corresponding additionally with the machining lathes to insure precision specs and matching of case and screw backs to insure water tight integrity.
In general models with similar cases seem to appear with the same case number, and the finish (PVD or polished or brushed) is immaterial, whereas the metal used (steel or titanium) does make a difference to the case number.
Whatever the meaning, here is a table of case numbers collected so far from Paneristi, so these aren't rumour, they are from real watches.
To support the theory that the numbers refer to cases, for instance several different types of 40mm Luminor Automatics all share OP6529, however the C series GMT suddenly appears in amongst several B series watches. Who knows?
| OP65xx | Year | Reference | Name | Case finish, size, style |
| OP6500 | 1997 | PAM 1 | Luminor Marina | Polished 44mm Luminor |
| OP6501 | 1997 | PAM 6 | Mare Nostrum | Polished 42mm Mare Nostrum |
| OP6502 | A | PAM 9 | Luminor Base | PVD 44mm Luminor |
| B | PAM 9 | Luminor Base | PVD 44mm Luminor | |
| A | PAM 2 | Luminor Base | Polished 44mm Luminor | |
| OP6504 | A | PAM 22 | Luminor Marina Destro | Polished 44mm Luminor Destro |
| A | PAM 26 | Luminor Marina Destro | PVD 44mm Luminor Destro | |
| B | PAM 26 | Luminor Marina Destro | PVD 44mm Luminor Destro | |
| OP6505 | A | PAM29 | Luminor GMT | Polished 44mm Luminor GMT, numeral on bezel |
| OP6506 | A | PAM26 | Luminor Submersible | Polished 44mm Luminor Submersible |
| OP6508 | A | PAM27 | Luminor Power Reserve | Polished 44mm Luminor Power Reserve |
| OP6510 | B | PAM 40 | Luminor Marina Ti | Titanium 44mm Luminor Marina |
| OP6513 | B | PAM 36 | Luminor Marina Militare Ti | Titanium 44mm Luminor Marina, with sapphire crystal back |
| OP6515 | B | PAM 46 | Radiomir Alarm GMT | 40mm (?) white gold Radiomir with alarm controls |
| OP6517 | B | PAM 47 | Radiomir Chrono Split Seconds | 40mm steel Radiomir with chrono pushers |
| OP6518 | B | PAM 1 | Luminor Marina | Polished 44mm Luminor |
| C | PAM 1 | Luminor Marina | Polished 44mm Luminor | |
| D | PAM 1 | Luminor Marina | Polished 44mm Luminor | |
| OP6519 | B | PAM 4 | Luminor Marina | PVD 44mm Luminor |
| OP6520 | B | PAM 2 | Luminor Base | Polished 44mm Luminor (?) |
| OP6521 | B | PAM 9 | Luminor Base | PVD 44mm Luminor |
| OP6523 | B | PAM 26 | Luminor Marina Destro | PVD 44mm Luminor Destro |
| OP6524 | C | PAM 63 | Luminor GMT | Polished 44mm Luminor, no numerals on bezel |
| OP6525 | C | PAM 27 | Luminor Power Reserve | Polished 44mm Luminor |
| OP6526 | B | PAM 28 | Luminor Power Reserve | PVD 44mm Luminor |
| OP6527 | C | PAM 24 | Luminor Submersible | Polished 44mm Luminor Submersible |
| OP6528 | C | PAM 25 | Luminor Submersible | Titanium 44mm Luminor Submersible |
| OP6529 | B | PAM 48 | Luminor Automatic | Polished 40mm Luminor |
| B | PAM 50 | Luminor Automatic | Polished 40mm Luminor | |
| C | PAM 70 | Luminor Automatic | Brushed 40mm Luminor | |
| OP6531 | B | PAM 52 | Luminor Chrono | Steel / titanium 40mm Luminor Chrono |
| C | PAM 72 | Luminor Chrono | Steel / titanium 40mm Luminor Chrono | |
| OP6535 | C | PAM 82 | Luminor Marina Militare | Titanium 44mm Luminor |
| D | PAM 61 | Luminor Marina | Titanium 44mm Luminor | |
| D | PAM 55 | Luminor Base | Titanium 44mm Luminor | |
| OP6537 | C | PAM 56 | Luminor Marina Destro | Titanium 44mm Luminor Marina Destro |
| OP6538 | C | PAM 57 | Luminor Power Reserve | Titanium 44mm Luminor |
| OP6540 | C | PAM 62 | Radiomir | 40mm white gold Radiomir |
| OP6541 | C | PAM 64 | 1000m Submersible | 44mm brushed steel Luminor Submersible, with helium release valve |
| OP6541 | C | PAM 65 | Radiomir Platinum | 42mm platinum Radiomir |
| OP6553 | D | PAM 86 | Luminor Automatic 44mm | Brushed 44mm Luminor |
| OP6556 | E | PAM 90 | Luminor Power Reserve | Steel 44mm Luminor Power Reserve |
| OP6557 | D | PAM 90(?) | Luminor Power Reserve | Steel 44mm Luminor Power Reserve |
| OP6560 | D | PAM 70 | Luminor Automatic 40mm | Steel 40mm Luminor |
| OP6561 | D | PAM 24 | Luminor Submersible | Steel 44mm Luminor submersible |
| OP6567 | E | PAM 111 | Luminor Marina | Steel 44mm Luminor Marina |
| OP6571 | E | PAM 117 | Luminor Marina Destro | Titanium 44mm Luminor Marina Destro, display back |
| OP6576 | E | PAM 127 | Luminor 1950 | Steel 47mm Luminor 1950 |