Tire Air Gage (Heritage District, Sunnyvale)

Have two Tire Air Gages. One measures from 20 to 120 PSI. The other measures from 5 to 50 PSI.
Maybe the first for cars and the 2nd is for bikes ?? I don't fully understand them and that is why I am giving them away. I think my husband who passed away in 2009 used to use them.