New SEIKO Prospex SBDC101 etc. 20mm Rubber Belt Reference number: R03E011J0 *Spring bars not included Lug width --- 20mm Buckle width --- 18mm SBDC105 SBDC111 Genuine Color: Black Made of silicone rubber Also, I think it can be attached to Seiko divers' watches with a lug width of 20mm. SEIKO PROSPEX 1965 1968 1971 Mechanical Divers Modern design 63MAS SBDC 100 series Applicable models: SBDC101, SBDC103 SBDC105, SBDC141, SBDC163, SBDC165 SBDC103, SBDC107, SBDC139, SBDC165 SBDC195 SBDC197 SBDC199 SBDC167 SBDC153 SBDC150 SBDC109 SBDC123 SBDC143 SBDC169 etc. The 7th image is an image of the applicable models. Please purchase only if you understand that it is stored at home.