Hi, I’m new here, and new to vintage safes. THE rear cover in your photo is an exact match to a safe I just picked up. Due to it sitting outside and rusted pretty bad, I cut the door open and removed the lock mechanism to avoid damaging it. I found that the combination is actually Left, right, left………4x Left, then 3x Right, then 2x Left, then turning to the right the fence will gravity drop around I beleive it was between 4 and 9. If this is helpful please let me know, I’m interested in additional photos of your lock and it’s assembly. If you do take it apart as the other guy suggested, I found a patent date of Nov 25, 1905 on mine. Hope to here from you.