Crowned Koi
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Crowned Koi
The Collection

Explore Our Watches

Curated vintage & collectible timepieces

By appointment in NYC

Every watch authenticated in-house by Pat. Reply to any email or text to reach him directly.

pat@crownedkoi.comMon–Sat · 10a–7p ET

Crowned Koi

Certificate of Authentication

CK-CERT-F6CF78BB

Brand

Rolex

Model

GMT-Master II

Reference

16710

Serial

A8•••••

Authenticated by

Pat at Crowned Koi

Date Issued

April 28, 2026

Scan to verify CK-CERT-F6CF78BB

Verify at crownedkoi.com/authentication/f6cf78bbe26b4821bdce4ed2dbdbd8b3

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