The standard 20mm silicon strap for the SNE439 (solar diver). A comfortable and flexible strap, but not as soft as the new Turtle strap. It has a steel keeper, and a large buckle, both with SEIKO engraved. The strap is 20mm between the lugs, 23,1 mm against the watch case and tapers to 20 mm at the buckle. The notches look a bit square.
