AP 1275 1930

[QUOTE=aircraftclocks;2096121]I am looking for someone who lives in the Cleveland area to have a look at the contents of a book dated from the 1930’s in the Cleveland library. The information given is vague and I am not able to identify if this was an air publication etc.

Not in Cleveland but somewhere better with AP1275 1930 : “General Instrument Equipment for Aircraft ” in hand if you want to scan…