Assuming that you’ve got the ID correct down to the genus Planchonella, this is a perfect example where reasoning and probabilities would be of much more practical use than the minutiae of wood ID. Because it’s quite difficult (in many cases, impossible with our current tools/knowledge) to ID wood down to a species level. What would be a more practical question is to attempt to find out where this company was located, if they had a habit of using local versus imported woods, and what woods might’ve been available at the time and place you mentioned.

Keating and Bolza’s book “Characteristics, Properties, and Uses of Timbers: South-east Asia, Northern Australia, and the Pacific” covers 5 Planchonella species that were in commerce in the past, and might be a good place to start. Currently, I’ve not yet added an of these species to the site…

I think Chestnut

I too am saying that’s Walnut, based upon the difference in the heartwood/sapwood and the fact that it has a grey cast to it.

I have uploaded to Zip files with both planks. “A” and “B” they could very well be the same type of wood but they do have differences, clues below. Note the photos taken of end grains are fresh cut and sanded vs the overall plank view is as is.

A: is heavier than B. in comparison its the darker more red/brown. of the two. It didn’t light up as much when I sanded a piece.

B: was a bit easier to band saw. When I “broke off” an thin end piece the inner edge was almost “golden” remarkable sparkle to it. When sanded down “B” was a lighter in color, in comparison, far more blond than plank A. But just looking at the raw planks, they both are fairly red/brown in nature.

I’ve taken pictures in different lighting, both from the inside and outside. The door is stained, but the photos showing the side and top edges reveal freshly cut wood since I had to trim the door to fit. I suspect the vertical and horizontal wood might be different species, but I could be wrong.

Maybe it’s Guayubira /Guayaibi? Patagonula americana

Looks like oak to me. It’s a ring porous wood, so it’s not birch.

I narrowed it down by the amount of red colored woods in Laos but I still need help. It’s funny they cut a notch out of every piece to call it worked so it can be exported.