R152 "FRANKLIN"- Genuine Suede strap with the stitching matching the colour of the strap. When you purchase a RIOS1931 watch strap you are acquiring a high quality craft product. The combination of traditional , handcrafted perfection while constantly evolving has made the watch straps of RIOS1931 a unique, top quality product. R152 "FRANKLIN" watch straps are available from 18 to 22mm, in black, dark brown, tan, grey. Thickness of strap: (approx) 3.5 mm to 3.0 mm. Cross Section: block. Select the size and colour that best suits your needs. Lug/Buckle Measurements: 18/16mm, 20/16mm, 22/18mm.