Crowned Koi
Certificate of Authentication
CK-CERT-5382BB1C
Brand
Rolex
Model
GMT-Master II
Reference
16710
Year
1999
Serial
A9•••••
Authenticated by
Pat at Crowned Koi
Date Issued
August 26, 2026
Verify at crownedkoi.com/authentication/5382bb1cb9514d88956334d79fe608c6