1999 Omega Speedmaster Triple Calendar Watch Mark40 Cosmos 3520.50 w/Box

Up for grabs is an Omega Speedmaster Triple Calendar MK40

Reference 3520.50 with black dial, bezel, 39mm case

56.9 mil serial number circa 1999 production

Very good vintage condition with signs of wear and age. Appears unpolished. Clear serial number on caseback.

Dial and hands are original and damage-free.

Original Omega bracelet with full links, fits a large wrist.

Watch comes with Omega boxes and manual.

No service history is known. Timegrapher shows -8 seconds per day at about 270 amplitude.