I'm not quite sure which incarnation of The Golddiggers this spot is promoting. The group of lovely, talented young women first appeared on The Dean Martin Show in 1968. During the summers of 1968, 1969 and 1970 they headlined their own summer replacement variety show known as Dean Martin Presents The Golddiggers and later Dean Martin Presents The Golddiggers In London. A syndicated series, officially called Chevrolet Presents The Golddiggers. Plus, there were U.S.O. tours and other performances. Whew!
If I had to guess, I'd say this promotional spot was for syndicated series, the title of which would be shortened to just The Golddiggers. Check out the official, authorized website for The Golddiggers here.