2- Lockblade (Schrade, USA 5CT Old Timer)
Probably a 5OT. Some of their stamps can be a bit ambiguous, especially considering the effects of a heavy stamp, light stamp, or worn stamp. You'd be surprised how many "84 OT" knives have been advertised on eBay. (hint: there's no such thing as an 84-OT, but there are plenty of 34-OT knives with heavy stamping.)
And sometimes the ambiguity isn't Schrade's fault, I just need my reading glasses.