I have touched the LL sheep jackets, they are not exactly thin nor fragile. But I absolutely agree, original cowhide is the way to go for a Lewis jacket. My 391 is the good old cowhide, the leather is so good that.... after over 8 years of casual wear, it still looks new..... I bet that a lot of people here won't like it .
Oh yes, the cowhide! So that is the hide that the 391 was probably also first made back in 1958? Does cowhide break-in more easily than horsehide?
Do you happen to have any pictures of your cowhide 391?