I've actually been asking around about this on SF but haven't had any luck with answers. If you delve a bit more there's options for pretty much any kind of leather including "French calf" and "English calf" and a few other nationalities. Is there much/any difference in price and quality between calf leather from different countries? Also if you can tell me wth museum calf is I'd also like to know. Wootten seem pretty experienced and capable with a wide variety of leathers so I'm sure he can tell me himself but i always prefer to get my info from someone who isn't trying to sell me a product if I can.
i dont work for Jess, and dont know him and his bussiness well enough to answer those questions. but i assume leather is no different to woollen cloth, you get what you pay for. when i was planning my shoes, i asked him for a fine calf in a smooth matte black finish. i might be going past there on the weekend as im thinking of getting him to make me a pair of leather soled welted golf shoes. i can ask him for more detail on his leathers, prices etc when im there.