quattro[Moderator]
18457
Patek Philippe ref. 2497 & 2438/1
The reference 2497 was Patek Philippe's first serially produced center seconds perpetual calendar, powered by caliber 27SC Q. The case measures approximately 37 x 12.5mm.
The reference 2438/1 is a waterproof version of the 2497, with a screw-down case back.
Only 179 examples of both references combined were made during a 12-year run from 1951 to 1963 in two standard dial variations and two casemakers (Vichet & Wenger): 114 were the ref. 2497 and 65 were the ref. 2438/1. That total number is easily found because production was reserved for a specifically dedicated movement number range, starting at 888.000.
There are two major articles on Hodinkee concerning these references:
I hope you will enjoy this quite demanding thread!
A/ REF. 2497
I/ 1st SERIES DIAL (small Arabic numerals on the even numbers & small dots on the odds, mostly leaf hands)
a/ YELLOW GOLD
1/ Movement n° 888.025 & Vichet case

credit: amsterdam vintage watches
2/ German calendar & Wenger case

credit: hodinkee
3/ Movement n° 888.049, retailed by Garrard & Co

credit: christie’s
4/ Movement n° 888.093 & Wenger case - this watch has belonged to Ethiopian Emperor Haile Selassie

credit: hodinkee
5/ Movement n° 888.093 & unusual Vichet case with different lugs - this model is referred to as ref. 2497/2498

credit:
6/ The 'Fullerton': movement n° 888.000 in a unique case by Vichet

credit: christie’s
b/ PINK GOLD
1/ German calendar, cyclop for the day and month & Wenger case


credit: hodinkee
2/ Movement n° 888.041 & Vichet case - This watch belonged to Peter S. Knoll

credit: hodinkee
3/ The 'Sydney Rose', movement n° 888.093, Wenger case & bracelet

credit: loupiosity & phillips
c/ WHITE GOLD
1/ Movement n° 888.054



credit: hodinkee (1-6 + 9-10), Sjx (7) & loupiosity (8)
2/ Movement n° 888.015

credit: horbiter & christie's
3/ Movement n° 888.055

credit: antiquorum
II/ 2nd SERIES DIAL (baton hour markers and dauphine hands)
"Mark I" dials=baton markers are elongated triangles truncated at the ends
"Mark II" dials=elongated pyramids with sloping points at the top and bottom
credit: christie's
a/ YELLOW GOLD
1/ No precise info on this model sold by Matthew Bain Inc.

credit: Matthew Bain
2/ Movement n° 888.114
credit: christie's
3/ Movement n° 888.178

credit: christie's
4/ Movement n° 888.132

credit: antiquorum
5/ Movement n° 888.121

credit: Sjx
b/ PINK GOLD
Movement n° 888.028 & Pink dial

credit: revolution
III/ RARE DIALS with PLATINUM CASE
1/ Diamond indexes

credit: John Goldberger
2/ Breguet numerals

credit: christie’s
B/ REF. 2438/1 (WATERPROOF REFERENCE WITH SCREW-DOWN CASE BACK)
I/ YELLOW GOLD
1/ Tiffany

credit: hodinkee
2/ The 'Hölscher'

credit: le monde Edmond & christie's
3/ No precise info on this watch sold by Vintage Watches Miami

credit: Vintage Watches Miami
4/ Movement n° 888.167

credit: phillips
5/ Movement n° 888.172

credit: everywatch
6/ Movement n° 888.165

credit: phillips
7/ Movement n° 888.163

credit: phillips
8/ Movement n° 888.171

credit: antiquorum
II/ PINK GOLD
1/ Movement n° 888.175

credit: Sjx
2/ Movement n° 888.110

credit: christie’s
3/ Movement n° 888.177

credit: christie’s