Thanks, I couldn't tell from the photo if there was a condenser in that left=hand holder.
It's an odd one, I did look at all the BJP Almanacs with F Charten adverts, that was only 3 or 4 years just before WWII. The position in the Almanacs would indicate they were exporting to your neck of the woods. There's quite a sophisticated modern looking Glove MF enlarger (even by post WWII standards), rotary glazer, etc, in the adverts. The cameras were a field camera based on a Houghton design and a tailboard studio camera of Reisekamera style.
There are not a lot of details about F Charten & Co, except that they were linked to Asahi Bussan in Tokyo, who made Olympic cameras, eventually merging into the company that became Ricoh.
Ian