Chainsaw Repair

Thought I'd bump the thread....Since starting this thread the earliest application guide other than my early/mid 50's Oregon guide that I've come up with is from 1985, it does have many more of the multi mount patterns and some more of the oddball mounts which helps, but has no cross reference for the older 5 and 6 digit bar numbers, nor does it give a reason for the multi mount patterns, so I guess I'm on the lookout for a 70's application guide, these 5 and 6 digit bar codes must be from that time period, maybe even mid/late 60's.