Blancpain. A fine and rare 18K gold manual wind tourbillon...

Blancpain. A fine and rare 18K gold manual wind tourbillon calendar wristwatch with 8 days power reserve
Blancpain. Belle et rare montre bracelet en or jaune 18K (750) mouvement tourbillon mécanique avec date et réserve de marche 8 jours
Model: Villeret Tourbillon 8 jours, No.41
Date: Circa 1990
Movement: 19-jewel Cal.23 manual wind, adjusted to 5 positions, No.00138
Dial: White, applied gilt Roman numeral hour markers, tourbillon aperture at 12, power reserve indication at 6 and calendar at 9, gilt polished spade hands
Case: Polished round, exhibition snap on back
Strap/Bracelet: Blancpain black crocodile leather
Buckle/Clasp: Signed 18K gold buckle
Signed: Case, dial & movement
Size: 34mm
Weight: 54,37g