ID this 37mm please?

[5th Armored]

Can anybody ID the projo on the left please? It is stamped M/43 on the side. I've no other info on it besides this pic - other than that it fits in a US 37mm M16 case. I think it's not US but other than that I don't kow what it is.
Cheers!
Chris

 

[5th Armored]

Additional info on the stamping:

 

[MINENAZ16]

Hello,

Such a marking m/43 sounds Swedish (just a thought)