Royal Jewelers is an authorized Tudor dealer in the Boston area and offers the Tudor Black Bay 31 S&G with Tudor's 5 year warranty.

Five-year transferable guarantee with no registration or periodic maintenance checks required

31mm 316L steel case with polished and satin finish

Manufacture Calibre MT5201 (COSC)
Self-winding mechanical movement with bidirectional rotor system
Integrated construction

Power reserve of approximately 50 hours

Yellow gold screw-down winding crown with the TUDOR rose in relief

Waterproof to 100m (330 ft)

Fixed bezel in steel covered by a 0.3mm 18 ct yellow gold cap

Champagne-colour with diamond hour markers, flat

Sapphire crystal

Yellow gold center links at 6 and 12 o’clock. Remaining center links in steel covered by a 0.2mm 18 ct yellow gold cap. "T-fit" folding clasp with safety catch. The logo on the catch is made of yellow gold