Alden guitars were produced by CMI, Chicago.
Some of the pickups used in their guitars are shown below:
Hershey Bar pickup with dimpled top panel, riveted to pickguard as in Alden Stratotone guitar.
Plain Hershey Bar pickup with hollow rivets, for woodscrew fixing directly into guitar body or through timber base
Alden Stratotone with plain Hershey Bar pickup with hollow rivets. B0167
Single-pickup Stratotone with dimpled top panel riveted to pickguard. B0491.
Twin pickup Alden Stratotone guitar B0491.