Certina OEM genuine leather watch strap with deployant clasp.
Black leather with croco grain, fluo/yellow stitches.
Marked on the inside CERTINA | C610 018 594 | STQ – VB. The short part is marked 21 – 20 90 (21 mm at the lugs end, 20 mm at the clasp end, 90 mm total length) , the long part is marked 21 – 20 120 (21 mm at the lugs end, 20 mm at the clasp end, 120 mm total length). The clasp is marked STAINLESS STEEL | C640.39 AA.
New, never worn, no package.