It strikes me as pretty reckless and irresponsible to truck in such unsubstantiated smearing of Fogel's card and the other two 10s, saying— without proof— that all have been doctored and/or cut from sheets.
Here is all I could find; this first information quoted below is from an article on Sports Collector's Daily:
"Fogel’s card, among the earliest graded by PSA, had originated with the famous 1980s Massachusetts find made by Alan “Mr. Mint” Rosen, who purchased hundreds of high-grade 1952 Topps cards –even the original Topps case they were stored in– from a man in Quincy, MA in 1986."
https://www.sportscollectorsdaily.co...psa-10-mantle/
This Forbes article also traces the Fogel specimen's origins to the Rosen Find...
https://www.forbes.com/sites/davidse.../#29c6ebc43a99
From PSA's website:
Fogel-Murphy Specimen. The card came from the fabulous 1952 Topps collection of Mark Murphy. It was then sold by dealer Bill Hughes to Collectors Universe CEO David Hall for $50,000 in 1993. When Hall's collection was auctioned by Superior in 1996, renowned collector Marshall Fogel purchased the card for $121,000.
Wormser-Candiotti Specimen. This specimen was from Ed Wormser's wonderful collection. Sold in the Wormser sale by Robert Edward Auctions in 1996. Resold by Superior in 1998 to former major league pitcher, Tom Candiotti, for $104,500.
Roehrig-Garcia Specimen. First sent in to PSA for grading by dealer Craig Roehrig. Sold to Peter Garcia in 1999 for $160,000. Resold by Superior to an anonymous collector in June, 2001 for $275,000.