My 1958 Pioneer snare, (it has a date stamp, transition badge), has that same mahogany interior with chalk markings. I'd post a pic but one of my nephews currently has the drum.Here are a few pictures of the inside of the bass drum.
The bearing edges look fine. Heads on both sides spin freely.
The drum is musty smelling but I don't see any signs of water damage.
There is writing in chalk. I can't tell what the word is but can see "22". The wood inside is a bit dry and could use a wipe of some type of oil but I don't want to potentially wipe away any chalk.
I didn't see a date.
The patch/plug at the top is roughly 1 1/2" in diameter. There is some cracking that runs along edge of the hole.
Does 1 1/2" diameter seem about right for a cymbal mount?
There are 6 small plugged holes that were probably from a rail mount.
Most of the tuning rods are bent. Not quite sure how that happens.
Pics of the bearing edge at the scarf joint may not show much as there is a fair bit of light blue and black overspray. I hope those black specks aren't actually mold! I lightly wiped with a damp paper towel but that didn't help much.
On my 20" 1969 club date bass drum I had an Inde single tom mount installed along with Inde light weight legs attached by BR3 mounts, great sounding drum.