The T1374101604100 is water‑resistant up to 10 bar (100 metres / 330 feet). The standard strap is blue leather (alligator‑style) with quick‑release feature; it’s interchangeable for other straps without needing tools. https://saicreationswatches.com/products/t1374101604100-t-classic-prx-analog-watch-for-men