Re: 88 Jem 77FP - pups ID
Sorry I meant to answer that directly as well; the early Jems had strictly 'standard' spacing, yes.
Good question; when DID DiMarzio start doing F-Spacing?
If I remember, I'll research or fire off an email - I've had some good luck getting info directly from the legendary Mr. Steve Blucher there.
There's too many Steve's getting involved here...