Also mentioned by Gene Trimble on Marlow - http://www.marlowcasinochips.com/links/genetrimble/arrowdie/arrowdie.htm

"Tommy Callahan was the GM of the Four Queens and had points in the operation, when it opened in 1966. You can find more information about Tommy Callahan in my 5 part series of research on the Arrowhead Inn, Branch Hill, Ohio, circa 1937 at Chequers.com. (This domain is expired, https://chequers.com/)
Callahan started his career as food and beverage manager at the Arrowhead. He went on to become a major player in the illegal casino operations in southern Ohio and northern Kentucky. The Cleveland Syndicates czar for northern KY, Sammy Schrader said that Callahan was the only man he ever made a call for, to be put to work in Las Vegas. Callahan started at the Desert Inn and at one time had a piece of the Pioneer Club. "

And as the story weaves and turns: http://lovelandbeacon.com/13737-2/ a story about The Arrowhead Inn, Loveland (Branch Hill), Ohio, with chip photos and history. Loveland to Las Vegas