The Panerai Luminor Marina PAM00050 is a 40mm automatic wristwatch produced between 1999 and 2008, featuring a cushion-shaped stainless steel case and a black dial.  It is powered by the COSC-certified Panerai Calibre OP III automatic movement, which offers a 42-hour power reserve and beats at 28,800 vph with 21 jewels.

• Case: 40mm diameter, 15.4mm thickness, with the signature patented crown protector and screw-down crown. 

• Dial: Black with luminous stick indices, Arabic numerals at 12 and 6, a small seconds sub-dial at 9 o'clock, and a date window at 3 o'clock. 

• Water Resistance: 300 meters (30 ATM). 

• Crystal: Scratch-resistant sapphire with an anti-reflective coating and cyclops date magnifier. 

• Bracelet: Stainless steel with brushed and polished finishes and a double deployant clasp. 

• Type: Automatic winding mechanical movement. 

• Base: Valjoux 7750-P1 (modified by SOPROD for Panerai). 

• Jewels: 21 jewels.

• Frequency: 28,800 vibrations per hour (4 Hz). 

• Power Reserve: Approximately 42 hours. 

• Functions: Hours, minutes, small seconds at 9 o'clock, and date at 3 o'clock. 

• Balance: Glucydur® balance with Incabloc® anti-shock device. 

• Decoration: Bridges and oscillating weight personalized with Panerai branding; some versions feature Côtes de Genève decoration. 

• Certification: COSC Certified (Chronometer).

• Dimensions: 13¼ lignes (approx. 29.89 mm diameter, 7.90 mm height).