Steyr Maschinenpistole 34 österreichisch
This weapon is the Steyr manufactured MP34. Labelled the MP34ö by the Germans to differentiate it from the Bergman MP34, the ö stood for Austrian (Österreichisch). This weapon was very well manufactured and this led to its downfall since it made it expensive to build when compared with competitors like the MP38/40 or later MP43/44. It’s service life was limited to use by police units and later the Waffen-ϟϟ. There were a number of these that were exported to Portugal, some of the later ones were chambered in 9mm Luger.
I believe this to be one of those wartime manufactures as it has WaA189 stamps on the frame and bolt indicating it was manufactured in the Steyr-Daimler plant in Warsaw, Poland. The stock has the Portuguese crown stamped into it as well as the number 1942, which I assume is the contract year.
And finally, a couple of photos of it with an M95 Steyr bayonet fitted. In German service this would be correct. In Portuguese service these were fitted with a purpose made Mp34 bayonet.