Omega Speedmaster Mark 40 Automatic Triple Calendar Chronograph 3520.53
Updated August 6, 2026
| Lot number | 1141Y |
| Estimate | $9,537 - $12,398 |
| Opening bid | $4,550 |
| Category | Jewelry & Watches |
| Auction | No Reserve Lab Grown Loose Diamonds & Jewelry |
| Date | August 9, 2026 at 8:00 AM EDT |
| Auction house | Diamond Depot |
| Location | New York, New York |
Omega Speedmaster Mark 40 Automatic Triple Calendar Chronograph 3520.53 This pre-owned OMEGA Speedmaster Mark 40 (Ref. 3520.53) is a men's automatic wristwatch featuring a stainless steel case and
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