You are considering a brand new aftermarket dark brown leather strap with tan lining and white stitching manufactured for perfect fitment for fine Breitling timepieces. The strap measures 110mm x 22mm (at the lugs) / 20mm at the buckle and 90mm x 24mm.
The strap is made for the steel clasp which is included. This is a brand new polished stainless steel clasp with a snap lock release.