Self-service tube tester allowed TV owners to replace tubes at corner grocery stores at Oklahoma History Center. Oklahoma City, OK.

Self-service tube tester (c1950-60s) allowed TV owners to replace tubes at corner grocery stores at Oklahoma History Center. Oklahoma City, OK.

Self-service tube tester (c1950-60s) allowed TV owners to replace tubes at corner grocery stores at Oklahoma History Center. Oklahoma City, OK.
Photo by Jim Steinhart © 2011, all rights reserved. (Ref: OKCH66)

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