The T137.407.21.031.00 (T1374072103100) features a grey stainless steel integrated bracelet with interchangeable quick‑release links, and secures with a butterfly clasp with push-buttons for both comfort and convenience https://saicreationswatches.com/products/t1374072103100-tissot-unisex-t-classic-prx-powermatic-80-watch-for-men