Interesting....
Now I will have to check the ones I have lying around and inspect the dates to see if mine have varied dates as well!
Curious!
Still looking for info on these, have seen a couple of pics of similar blocks with mixed dates but no explanation
Got these ones in two blocks of four but even though they have dates on I have no idea when these were issued as the dates are; Black Brant 1960, Common Eider 1966, Mottled Duck 1961 and Canvas Back 1968 on 1st one, three repeated on 2nd one with Wood Duck 1968.
re: Dates of issue for Nat. Wildlife Federation
Interesting....
Now I will have to check the ones I have lying around and inspect the dates to see if mine have varied dates as well!
Curious!
re: Dates of issue for Nat. Wildlife Federation
Still looking for info on these, have seen a couple of pics of similar blocks with mixed dates but no explanation