Marriage Sturmanskie USSR Made This is a vintage (marriage) collector's wristwatch. Mechanical movement; 15 jewels, Mechanics: manual winding, Case diameter with crown: 36.5 mm, without crown 34 mm Case length 41 mm Strap width: 18 mm. It is functional with a small time deviation, for its age The mechanism is from 1961 The dial and glass are new, now made. The case is from 1961, But the black strap is new The wristwatch has been serviced by a professional watchmaker. The watch has not been worn, it is like NEW. I send the package with tracking and insurance I will answer your questions