Crowned Koi
Certificate of Authentication
CK-CERT-1F82F2BD
Brand
Rolex
Model
GMT-Master II
Reference
16710
Serial
Y4•••••
Authenticated by
Pat at Crowned Koi
Date Issued
September 26, 2025
Verify at crownedkoi.com/authentication/1f82f2bd7fd74f99b5629701cb8b43c0