Beer Signs Inquiry

My dad obtained these signs from origins unknown prior to his death in 1963. The Clydesdales_Michelob (front/back) is a flourescent lighted hanging sign with pull chain. The Schlitz is flourescent with power cord only (no switch).
I am only looking for any history or background on these as there is nothing other then the Underwriter Laboratories inspection / approval for the light fixture.
I have no intention or interest in selling. The value is only sentimental and nostalgic.
If anyone can refer me to another sources for information I'd appreciate it.