Air Guage

[Levaughn]

Does anyone know how old this Air Guage is? It doesn't have any markings, but the tip looks old. Maybe a generic auto store brand? Thanks

 

[lilredex]

Would guess not older than 20-30 years with metric on that dial. The fitting could be older....just my thoughts.

The back side looks just like the Marshalltown Gauges we sold in the seventies.

 

[Levaughn]

Thanks.

 

[The Cobbler]

doesn't look to be anything special . I would agree on the previous posters age ,perhaps even from the 70's? the end might be cast pot metal?
it's a neat gauge in any event.