The 105.012-66 marks the long-lasting adoption of the single-bevel caseback. There were two case manufactures: La Centrale Boites (CB) and Huguenin Freres (HF). The watch here is a CB, which means the lugs have a flat top and a small step. This reference had the short run of the movement numbers 24.533.xxx – 25.448.xxx.

Serial: 25,4XX,XXX

Dated: 1967 October

Case Reference: 105.012-66 CB

Dial: Tritium – Patina into Tannish White – 90% of Swiss Made Worn Away

Hands: Hands in Great Shape – Patina

Case: Polished Previously - good condition – Has Wear

Bezel: Dot Diagonal to 70/Dot over 90– Marks throughout insert

Bracelet: New aftermarket Canvas Gray Strap

Pushers: Service Pushers installed

Caseback: Correct – Speedmaster in center – Mark in center and worn down

Movement: 321 (Serviced January 2022)

Glass: Hesalite

Accessories: Extracts from Omega ordered (November 2021)