Made in
1999 for the Russian market to celebrate the return of Patek Philippe in
Russia, these references are powered by
caliber 315 SC, have a case of
37.5 x 10.4mm and feature a
blue cloisonné enamel crown.
The 5091 models come with a bracelet, whereas the 5090 models come with a leather strap. Their sculptural design is responsible for the name of the model: Sculpture.
Best.
A/ Ref. 5091
1/ Steel
a/ Ref. 5091/1A-001

credit: Watch_Lova on reddit (1-2) & BarryW on timezone
b/ Ref. 5091/1A-010

credit: analog shift
2/ Steel & gold
a/ Ref. 5091/1JA-010

credit: the 1916 company
b/ Ref. 5091/1JA-001

credit: bulang & sons
3/ Gold
Ref. 5091/1J-001

credit: the European watch company
B/ Ref. 5090 (I have found only gold variants)
1/ Ref. 5090J-001

credit: Patek Philippe blogspot hk

credit: bpc

credit: Ineichen
2/ Ref. 5090J-010 (the "-010" is only my guess)

credit: red rabbit luxury