This Speedmaster Professional 3570.50 is a rare iteration and last model using the tritium dial. The watch is New Old Stock, works well although never serviced and the red seal is still unbroken. It comes with blank warranty card, box and papers. The movement has not been identified as an 861 or 1861as it was not opened yet.
To buy, click here: https://www.timemerchants.ca/product-page/omega-speedmaster-3570-50-new-old-stock-1996-sealed
*** The pictures may show the reflection of the camera lens, black spots mostly ***
Material: Stainless Steel
Crystal: Plexi Glass
Movement: Manual Wind
Lug Width: 20mm