1938 Bofors 40mm cart case maker BH with arrow?

[Darkman]

I recently acquired this nice early 1938 Bofors case which is assumed to be Swedish made. The Bofors AB monogram is a B with an arrow through it, but who was BH with an arrow?

Thanks, Graeme

 

[Darkman]

Bofors Halmstad or Bofors Helsinborg possibly?

 

[Darkman]

Anybody? I'm keen to ID the maker of this case.