Kroll-II by Bencini, Milano, Italy

Don't know where I got this. Bencini achromatico F.55mm with f8 or f16. I think the little chrome dotted 'window' is just style. The gold bloomed viewfinder I think had some kind of split screen focusing system but the focus knob is stuck solid (might risk a drop of releasing agent...what have I got to lose?) so I can't verify this. Shutter powered purely by button push as you would expect, giving settings of B (time), 1/50s and 1/100).
Whole back detaches and has two little red windows for seeing the number of pictures taken on the paper backing of the film; not sure why two horizontal about a thumbs width apart? Solid, hefty aluminium body with flash mount of some kind, cord release socket. Age? Haven't Googled it yet and my massive volume (over 30 years old itself!) doesn't have it. I guess with the aluminium body just pre WW2.