The watch is the Chronomètre FB 1.6-3, link and it's being made for Monaco boutique retailer Art In Time, which concentrates on presenting high-grade, small production timepieces from makes like MB&F, Akrivia, Greubel Forsey, Moser, and Urwerk. FB 1.6-3 uses the sapphire-bridge caliber FB-T.FC-2, first introduced in 2017 in the titanium FB 1.4.
According to AP, it produced about 7,200 perpetual calendars over a 15-year period (including Royal Oak QPs) from 1978 through the link early '90s. Only 79 of these were the platinum ref. 25668, making this one of the rarer of the more than 70 references and 200 AP QP variations from this era.
After college, Akmaev continued his education at the University of Applied Arts in Moscow and took a part-time job at the local watch repair shop – his introduction to movements and the operations of basic cleaning and restoration. On occasion, the shop had high-end watches with hand engraving and it was there that Akmaev became fascinated by the meticulous engraving link and how it influenced the design.