Indonesian No.1 Mk.3 - Need help, info

[CINDERS]

There really is not any reason to panic about stripping the rifle so you can get to the markings most of them will be at the knox form & reinforce which amounts to taking the front sight protectors off, the front band & middle band taking off the top hand guard woods then the trigger guard screw front, trigger guard screw rear, remove the trigger guard, then tap on top of alternating sides the very back of the bottom wood near the wrist socket.
NEVER EVER try to pull the bottom wood off by levering it down from the front sight area you will shag that stock quicker than the time it takes to do a full stop.

Just make sure the collar goes back in for the trigger guard screw front and the rear top hand guard collar and the band screws go in from the left hand side (Same as the trigger guard rear screw & Front sight protector)

*you can put chalk in the markings to highlight them for the chaps to view here they are pretty cool with their knowledge.
There's scads of threads here how to do it by the personnel who worked on these for years.