Could be , a lot of water under the bridge since '65 ... can't see it being in a pile of returns though , doubt a single sided test press ever made it out of the plant/record company , especially if it were never issued as seems a likely possibility.
Would love to see it up close and get a loupe on it under a decent lamp , just need to find out which 'billy big-bollocks' forked out the $3000 .