MichaelC
[AP Moderator]
22088
Need some help solving the mystery?
If you PM me all of the information on the caseback, I can likely get the production information directly from AP 
Ref 25548 QP
Dear All, I just acquired a pre-owned AP ref. 25548 QP B-series. The previous owner ever sent this particular watch for authentication but the original date of purchase was not stated there. Any of you guys know roughly how old is this watch and when was ...
Need some help solving the mystery?
If you PM me all of the information on the caseback, I can likely get the production information directly from AP
If it's a B-series, then late 1970s
The model debuted in 1978, and the "B" series ran until 1979/80. AP rolls to a new letter every 100,000 units, so how high is the numeric figure after the "B" on your caseback? That's your key to whether it was made closer to 78 or 80. I want to say it wa...
Two reasons, IMHO, This is a great find...
1. The months are presented individually and not crammed into one-quarter of the sub-dial. I realize this is done to indicate leap year, but that is a poor solution. This is an elegant solution. 2. The information in the sub-dials is represented \'radiall...