I came across these 2 signs from an individuals grandfather that worked at various gas stations and auto shops. These signs appear to be old stock and I would like to know what period these signs would be in? 70's? There is no markings on MFG or CO. Also unsure if there's a missing part of the sign where there appears to be a "bite marks". Any comments or info would be great.

Look like they go with the stand up GM Mr. Goodwrench sign. The cutouts fit under his fingers.

c1980 ?

Excellent! Yes, thank you. To bad Mr. Goodwrench wasn't to be found.