OEM SEIKO Prospex SBDC053, SBDC051. SBDC053, SBDC051. SRPH83K1 / 4R36-12M0, SBDC051 /. SBDC053 / SPB053J1 / 6R15-03W0. 20mm Black Silicone Rubber Strap. SEIKO Original Silicone Rubber. ・Lug Width: 20mm.
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