Although the United States Congress authorized 100,000 coins, only approximately 70,000 were struck. Of those, about 5,000 unsold coins were melted. The net mintage was 6,006 of the "2x2" variety and 59,038 of the plain variety. Many of these coins were weakly struck and are difficult to find in higher grades as so many of them circulated.
If thats a 2x2 version, its probably worth alot more than 40-50. with a mintage of only 6000.
I cant quite tell in the pics though.
I thought that would be true too, doesnt seem to be a difference in price despite the much lower mintage number. Ebay sold listings, lowest of any alabama half was $46 but this 2x2 is in pretty good shape and went for 86
1921 Alabama Centennial 2x2 Commemorative Half Dollar | eBay