Hi Jim,
The GDC Silver Strike does exist. My past inventory records do
show that I had both GDC & G mint mark strikes back in 2006.

My understanding is that the initial strike order from GDC was
only 200 strikes because casino management did not know if
the strike machine they had would get much play. It did well,
so a decision was made to order more of the same, but this time
they ordered 500 from Global minting (G mint mark). Again, the
info I had, they never ordered more, because the casino was not
doing well.

Dolphin Casino was located on Simpson Bay - St. Maarten. They
opened it's doors in Aug. of 1999, & closed up shop in Feb. 2010
The casino was located in the Caravanseria Beach Resort .....

In the early 2000's, I was doing alot with the Caribbean casinos,
silver strikes and casino chips.

Al Varelas / USMC
SS-1654