An automatic 'Luminor Marina' calendar wristwatch, by Panerai

An automatic 'Luminor Marina' calendar wristwatch, by Panerai
The circular black textured dial with applied gold luminous Arabic and baton numerals, magnified date display, small seconds, three part case with screw down back, crown protecting device and deployant clasp, dimensions of case 48mm (including crown protector) x 42mm
Dial signed Panerai Luminor Marina, case reverse inscribed Officine Panerai Firenza, No. OP 6580 BB 1072950 E015/400 300M, strap buckle signed Panerai