Hank Greenberg - AUTOGRAPHED (LOA) Hall-Fame Gold Plaque Postcard (on back

1952 is often thought of as Topps 1st baseball card set, but it was not.
Topps issued several smaller baseball card sets prior to their huge 1952 set.
Topps buzz word was "BIGGER is BETTER" for their 1952 Topps set which Topps described as: "GIANT IN BOTH SIZE and NUMBER of CARDS" (407).

Key card in the 1952 Topps set is #311 MICKEY MANTLE. Often called Mickey Mantle's Rookie card - BUT IT IS NOT. That honor goes to his 1951 Bowman.
1952 Topps "High Numbers" (#311-#407), are very, very scarce with an interesting story:
This HUGE set was released in series weeks apart. By the last (6th) series, baseball season was over and football starting. Candy shops had plenty of baseball cards from earlier series so most cancelled their orders for the last series creating the scarcity.

Adding interest is how Topps disposed of the now un-needed cards including THOUSANDS of 1952 Topps MICKEY MANTLE's. They dumped them into the Atlantic Ocean like most of New York's trash in those days.

There is one card for each NFL team in the 1976 Popsicle football card set PLUS a variation of the New York Giants. The Giants changed logos in 1976, but Popsicle didn't know so one card shows team's 1975 helmet and the corrected shows the 1976 helmet.

The cards are like thin plastic credit cards and held up well as apparently they came one per box of Popsicles.

The history of vintage baseball card auctions is long and colorful.

T-206 Honus Wagner tobacco cards have sold for upto $2.8 million in auction. The "Holy Grail of Sports Cards", it's extreme-high auction value can mostly be attributed to great PR and "auction fever". It's not close to being the rarest baseball card and Honus Wagner is not Babe Ruth or Mickey Mantle. Yes, the T-206 set is beautiful & special but because of the # of cards and scarcities, few collector's try to complete, which should keep auction competition down compared to say 1933 Goudey or 1952 Topps baseball card issues.
BUT IT DOES NOT...

There's a story Wagner banned his card because he was anti-tobacco but there are other stories about financial considerations.

You surely have heard of PSA and may even know that this card was the FIRST they ever graded. But did you know that dealer (B.l. .ast.o name encoded) admitted tampering with the card, perhaps having it trimmed down to size, before PSA graded it so highly for the auction.