B-3 horsehide facing - with, or without?

[Naphtali]

As near as I can tell, original B-3s had horsehide facing along undersides of sleeves. Other than cost, is there any reason why [some] reproductions omit the facing?

 

[cco23i]

Remember that some companies at the time didn't put the facings on. It's like the D-1's having no pockets. patch pockets or zippered pockets.

Scott

 

[normanf]

In repros, pockets, patch pockets and zippered pockets are to make the jacket more versatile in a civilian setting. But if absolute period detail accuracy is important, than those features can be omitted.