Tudor. A stainless steel automatic calendar wristwatch

Prince Oysterdate Submariner, Ref: 7021/0, Circa 1971

Model: Prince Oysterdate Submariner
Reference: 7021/0
Date: Circa 1971
Movement: 25-jewel Cal.2494 automatic
Dial: Black, luminous block hour markers, baton quarters, silvered outer minute divisions, magnified date aperture at 3, polished 'snowflake' hands with luminous inserts, centre seconds
Case: Brushed and polished tonneau form, screw down 'Original Oyster Case by Rolex Geneva' back, inside back date coded IV.70, shouldered crown, bi-directional ratcheted calibrated bezel with black insert, No.760616
Strap/Bracelet: Black leather
Buckle/Clasp: Steel buckle
Signed: Case, dial & movement
Size: 40mm