German Plane Cockpit Instrument?

[jamoros]

Hi guys, have this gauge and have no idea what is it, maybe someone can kindly give me some lead as to what is it?, many thanks, Juan

[Danmark]

From the fitting at the back I'd say a pressure related function.

[HPL2008]

From the fitting at the back I'd say a pressure related function.

That's for sure: "mm WS" is the abbreviation for "Millimeter Wassersäule" = "millimetres water column".

Beyond that; I don't know.

[jamoros]

Thanks guys, appreciate your input

[Gunny Hartmann]

I think it's a manifold pressure gauge!...

[jamoros]

Thanks mate, do you think is WWII period?, or is it too much to ask?

[Gunny Hartmann]

Thanks mate, do you think is WWII period?, or is it too much to ask?

There's a chance it's pre 1945 as i don't think many piston engined aircraft were built in (West) Germany, the east used piston engined Russian training aircraft possibly equipped with German instruments!..

[Danmark]

That's for sure: "mm WS" is the abbreviation for "Millimeter Wassersäule" = "millimetres water column".

Beyond that; I don't know.

Would "millimeters water column" possibly indicate a coolant tank capacity?
( knowing how specific Germans can be about things )

[Gunny Hartmann]

Would "millimeters water column" possibly indicate a coolant tank capacity?
( knowing how specific Germans can be about things )

It would have been measured in litres i reckon Dan!...

[HistoryMan]

Its an air pressure gauge of some sort in my opinion

1 mmWS = 0,0980665 mbar = 9,80665 Pa

cheers