.I saw this discussion and can help clarify the Litho-Cel Proof set.
My information comes directly from the Pacific Trading Cards production records. “The Shannon Books” .
Pacific Litho-Cel Proofs
36 players were in the set. 360 serial numbered sets were made. The cards were seeded approximately 1 card per 4-5 boxes.
Of the 360 total serial numbered sets, 42 sets were stamped/embossed with the Pacific Crown Collection logo. The stamped cards were mostly low serial numbered cards but a few higher numbers were also stamped. These were seeded approximately one per case.
Hope this helps
on a side note
My book
Cramer’s Choice:
Memoir of a Baseball Card Collector Turned Manufacturer
Will be coming out later this year from McFarland, Book Publishers
Cramer’s Choice is the rollicking tale of Pacific Trading Cards and the epic life of its founder.
Mike Cramer