Omega Speedmaster Professional aka Moonwatch - Ref. 311.

Here is the information about my Speedmaster:

There are no signs of use such as microswirls and any small scratches present..
The hesalite also has no traces

In 2019 I purchased it from Omega AD.

Complete set:
Original box, Original box, Initial purchase receipt, Warranty card, Manual, tape change tool.

Technical specifications:
Case diameter: 42 mm
Case & strap material: stainless steel
Glass: hesalite glass

Price: $3,600 + shipping