I live in Croatia, and I found a case in the attic of our office.
It's a fairly light wooden case, around 1m x 0.3m x 0.5m, with a large and a small compartment. The compartments have some sort of padding on the inside, so something fragile must have been kept in it.
I found this online, which leads me to believe it's either used for some sort of airplane instrument or a telegraph, which could mean it's anywhere from 1900 to WWII.
I was wondering if anyone could identify what could have been kept inside the case, which would identify the age more precisely.
Thanks.
I hope someone comes along that can help you here, but you may want to also try the helpful folks over at /r/whatisthisthing.
Alexander Muirhead founded Messrs Muirhead and Company in 1894.
The company made telegraph equipment originally. Later it made avionics equipment.
The company still exists in some form today. You might try contacting them to see what they know about your case.