I-S: As englishman says, all standard Mk III* parts. The Siamese script was marked only on receiver, barrel, bolt, bayonet and scabbard. My own example is mechanically solid (excellent bore) and has original barrel but a mismatched Siamese bolt but the forend was rotted badly. I felt that repairing the old stock was the best way to go as it had a nice dark appearance with all the dings, scrapes, etc that go with hard use. I would suggest you look for a replacement that is well used- NOS forend on pitted/ worn metal just doesn't look right. Good luck with it and show us what you do.
milsurpo
milsurpo