Audemars Piguet

I just received my Audemars Piguet Quantieme Perpetual Automatique back from service. This reference was one of the first watches that really got me interested in haute horology. It is commonly reported that this reference (and its variants) with the Royal Oak helped Audemars Piguet weather the quartz crisis. Over 2000 pieces of the references 5548 and 25548 were produced from 1978 – 1991.

 5548/25548 Specifications

• The 5548 was given the additional ‘2’ towards the end of 1984 to become the 25548 until it ceased production in 1991
• Total production from 1978 – 1991 documented at 2183 pieces (YG: 2066, WG: 80, PT: 32, SS: 4, PG: 1)
• 36 mm case diameter, 7-7.8mm thick dependent on variant
• Ultra-thin calibre 2120/2800 automatic perpetual calendar
• Correctors on the case at 4, 8, and 10 o'clock
• Four symmetrical white subsidiary dials, featuring a month indicator at 12 o'clock, date at 3 o'clock moon phase at 6 o'clock, and day register at the 9 o'clock position.

 Thanks for taking a look.

AP 25548

...this is about as perfect a dial/type layout as there is. If there was a Hall of Fame for dial design, this would be a first ballot, unanimous entry.

Must be a real pleasure on the wrist.

But it has evolved in price regions where can not follow . But it is a great watch with one of my favorites base calibers so enjoy it 

I'm thinking of buying this same model. What was the cost to service? How is the water resistance holding up?

unparalleled clarity of layout