1950's Calso to Chevron Oil & Gas Station Vari-Vue Keychain

1950's Calso to Chevron Oil & Gas Station Vari-Vue Keychain Vintage Chevron Key minder tag qith motion graphics. This is an Advertising flicker key that was given away at Calso Gas Stations announcing the Name change to the parent company "Chevron".** Hold it one way and you see the Calso Sign and the other way you view the person installing the new Chevron Sign.. From what I have read, the change happened in the mid 1950's. This is a dual view plastic & Paper key chain (Bead metal chain). These are for collectors and should NOT be given TO SMALL children EVER!! These have small parts This is a good size and about 1.7/8 inch across and 1.5" high . Please remember that these are novelty items and are not for children.