I can help a little. I will do the easy ones and leave the rest to the experts who know more about them than I ever will.
LC 69 Incendiary - Described on the Forum earlier. The bullet is a Cal .30 M1 Incendiary and should have an added cut cannelure for crimping.
Aluminum cased T9 - One of several loaded by Olin (WCC) in the late 60s or early 70s as a reserach project. Bullet should be Ball GM/steel core.
FA51 Observation - If the bullet is 7 ogive it is the T103E1. If it’s 10 ogive it’s the T103E2.
FA 52 w/10 ogive brass bullet - If the bullet is solid GM it would be one of the later Overhead Fire Application bullets, the XM178. However, I’ve never seen an OFA solid bullet this early. Maybe a dingbat?
Tracer FA (+) 59 - An M62 Tracer marked for special tests at Aberdeen Proving Ground (APG). Several variations of the yellow band are known. I’ve never seen anything describing what the “special tests” were.