there are inconsistancies in all 30 plus year old things. lp's are subject to their enviroment, even if they began life in the same pressing plant.
Vinyl records
I have two identical LP's from 1977 in excellent condition, but one plays noticeably louder then the other. Are these inconsistencies pretty common with older vinyl records? I've been into vinyl since 1969, but have never owned two identical LP's until today, so I've never noticed this problem in the past.