I don't think that stuff is the real brown as its linen and not canvas plus the color is wrong.

Someone would have to know how the old stuff was made or the supplier.

I do not know if Randall makes their own micarta in house or what.

Busse Combat does make theirs in house. I believe they frequently experiment around with colors since they have the snakeskin and tiger hide etc.

Jerry Busse is extremely knowledgable about Micarta and other phenolic resins.