R179 "BIRMINGHAM"- Genuine Vintage Leather watch strap with stitching in a cream white colour. 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. R179 "BIRMINGHAM" watch straps are available from 20 and 22mm, in black, brown, dark brown, tan, grey. Thickness of strap: (aprox) 3.0 mm to 3.0 mm. Cross Section: block. Select the size and colour that best suits your needs. Lug/Buckle Measurements: 20/20mm, 22/22mm.