One reason why the Fed branch in Denver released 2001-D JFK's, is that
Half-Dollar slot machines were still in use in the mountain gambling
towns (Black Hawk, Central City, Cripple Creek) in 2001. Those have
been replaced in the last few years by $1 (26.5mm) coin slot machines.
Some Half-Dollar slots were converted to 26.5mm Dollar coin slots.
A few times when I have spent BU Golden Dollars, the cashier assumed
that they were leftover gambling money! "Oh, you've been up on 'The Hill' ! "
JFK searchers in Denver still frequently find worn 1980's-1990's
JFK's that were used in those Half-Dollar slot machines. They're
just perfect to put into Salvation Army kettles.
Our mountain towns still use coin-operated slots down to the (1¢)
"Penny Slots", if anything the Penny Slots are more popular lately
because of the bad economy!