This is a Walker's KF-001 that I purchased about 10 years ago at corbo in Sendagaya. It's a model from the earliest collaboration between corbo and Wildswans. The outer zipper was originally a YKK injection molded zipper, but it broke once. I took it to the store, and they replaced it with a Riri zipper for free, and I've been using it ever since. I'm planning to buy a new wallet, so I'm putting this one up for sale. Made with saddle pull-up leather. It's been used for a long time, so there are some scratches and wear and tear. Please check the pictures. The sliders, both inside and outside, work without any problems. The old models have been discontinued and are no longer available. The price has also doubled due to the increase in value, so if you're looking for one, don't miss out. Walkers Corbo Wildswans