Made in 1966.
Chips made at the Burt Co in MA.
Note in the Burt Co records:
1966 Four Queens record:"Telephone order from Thomas Callahan (Four Queens, Inc.) - note: refer letter 9/22 Hotel Fremont, Mr FJ Mooney granting the Four Queens permission to use the arrowdie mold. Letter attached 4 Queens order."

You can read more about the order and the arrowdie mold here.
http://www.marlowcasinochips.com/links/genetrimble/arrowdie/arrowdie.htm