I purchased my alloy Unimat SL new in 1968, and it came with a "mahogany" stained box.? I still have it, and given the condition, I suspect it was a "semi-gloss" varnish stain, as it hasn't absorbed oil from ?years of use.
I recently acquired a NOS Unimat SL, as my half-century old original was wearing out.? It too has the same box finish which I believe is a varnish stain.
