In the past Rolex has made watches for various organizations, both military (British Forces) and scientific (Comex). These limited edition watches are highly collectible. One of the least known of this limited series is the one made for the Fuerza Aerea del Perú (FAP), a branch of the Peruvian military created from the merger of the Peruvian army and navy. FAP also obtained few Cosmographs. With the military designation engraved on the case back, these FAP Daytonas are now treasured possessions of collectors and exceedingly rare to find.
Some features distinguish the FAP Daytona from normal production models. For example, the above-mentioned engraving on the outside of the case back together with the engraving of the serial number on the inside which is normally placed between the lugs. This engraving changed with time from only the last three digits of the number to its entirety in later versions. The Fuerza Aerea del Perú designation is engraved around the edge of the case back by means of a rotary cutter, as can be noted by its depth and smoothness on the inside.
Fuerza Aerea del Perú is the Peruvian Air Force. It is the branch of the Peruvian Armed Forces tasked with defending the nation and its interests through the use of air power. Included in their responsibilities are assistance with internal security, disaster relief operations and participating in international peacekeeping operations.