SEIKO Marvel 1950s Hand-wound Wristwatch with Rare S-mark Dial

SEIKO (Seiko) watch, currently in working order, is functioning without any problems.

[Model/Part Number]
Marvel

[Specifications]
Year of manufacture: 1950s
Movement: Manual winding
Dial color: Silver
Case material: Stainless steel
Case diameter (width): 32mm
metal belt

SEIKO Marvel 1950s Hand-wound Wristwatch with Rare S-mark Dial