Grand Seiko Crocodile Leather Straps Give your Grand Seiko timepiece an entirely new look with these original Grand Seiko straps. This style is offered in black and brown in 21mm, and all straps are manufactured by hand in Japan and feature high-quality crocodile leather uppers. Please note that these straps are designed to fit Grand Seiko deployant clasps. Straps are currently available in 21mm. Straps are eligible for return under our standard return policy only if they are delivered to Grand Seiko in unworn and still sealed in the original packaging.