Here is a picture of a Proof Set received from the dealer - supposed to be 1976 Proof Set. But the three smaller denominations (1C, 5C and 10C) are shown to be dated 1975. Assuming the set hasn't been tampered with ( why would anyone tamper in such fashion) is it supposed to be a rare thing and would it command any premium. How to test positively for any tampering - looks good to me.
The dual-date 25c, 50c & $1 were used for both years - 1975 and 1976 - for the Bicentennial Set. The 1c, 5c & 10c were struck for each year. What you have is a 1975 Proof Set. Chris
It’s a 1975 proof set. In 1975 no quarters, halfs or, dollars were made with the date 1975. All were the 1776-1976 to keep up with high demand.
This is just a guess , but... Many of these Bi-centennial proof sets were actually minted in 1975. As you can see, only the major coins have the 1776 - 1976 dates, the other, minor coins, have the actual minting year of 1975. Thus, this is an untampered with, proof set, that was put together at the mint in 1975. Some might call it an " Early Release ". That is my best guess, however, there are many members of Coin Talk !! who have much more experience with these sets than I do, and they will be able to give you a much more definitive answer than I can. Thanks for posting such an inquisitive, and ultimately informing, question. Welcome to Coin Talk !!
Also, the Ike $1 is a Type 1 most likely. If I remember correctly, weren't all '75 proof set Ike's Type 1?
