The Model 1939 is a license built,
Rheinmettal  37mm anti-aircraft gun made in Romania by Astra. Only a couple hundred were produced.

Most likely the licensing and tooling were part of some trade agreement with Germany for strategic materials/commodities as they did with other neutral countries early in the war. Oil was probably the commodity.

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This M1939 was part of a small group imported 20 years ago.
All numbers match and it has seen little use. The dark green paint on the carriage looks original. The gun was polished and blued when new but the de-mill  was very thorough and the cosmetic restoration has left little of the original blued finish.

Totally nonfunctional as is all of our artillery.
Displays very well.