Bonjour Sharen & Ted,
I do not know how long this casino had the Silver strike machines. It must have been a fairly long time as this casino had 4 different series of strikes with 4 in each series for a total of 16 strikes from there. The 7-11 dice you show is from the standard casino games series of 4 that you see at other casinos.

Both Chisty G. & Dennis F. older guide and Bill Cohoneour's non-Nevada guides has a listing of the strikes from here.

The Shooting Star Casino is in Mahnomen, Minnesota -- located in the north west corner of Minnesota.

Dan