Ok, I give up; What is this??

[randyjaco]

I picked this up at a flea market. I thought it was an old-time tire pressure gauge, possibly of European origin. It seems to be trademarked as "Goodrich". Google Lens referred me to Primus stoves. First off it says "Manometer", which doesn't make sense. Then the units are "kg of qcm". I presume that is Kilograms/CM squared, which might indicate that it was not made for American use. The bottom has black rubber inside and looks like a tire pressure gauge of some sort. If I am correct about the units the "6" highlighted in red would be @85 psi. I can't imagine that old pneumatic tires could handle such pressure.
Anybody have a guess what I have here?
Thanks,
Randy

 

[MontanaLon]

Looks like a radiator pressure gauge from an old timey car.

 

[north1]

I think Eustace is right. Old timey rad pressure gauge.

 

[T Bredehoft]

85 PSI would blow a radiator apart. In USA, radiators weren't presurized at all until the '50s. Then it was 5 or 7 lbs.

Manometer would be for pressure, but perhaps 10.4 lbs = 12 KG/qcm not 170

That would make red 6 = 5.2

 

[Suzuki4evr]

Sorry,but I don't have a clue.

 

[Winegrower]

What’s a “qcm“?
I don’t see why this would be a square centimeter.

 

[JimDawson]

KG/qcm = ~ 1 bar. so 6 bar = 87 PSI

Best guess is a WW2 British aircraft tire pressure gauge. Manometer is just another name for pressure gauge.

 

[silence dogood]

I would guess that it is a pressure gauge for a steam boiler.

 

[benmychree]

In the old days, cars used high pressure tires; 85 lbs would not be out of the question. It definitely is a tire pressure gage. " Goodrich" says it all.

 

[Latinrascalrg1]

Another vote for a Radiator Pressure Gauge.