Another of Mike Sharp's prototypes. This one is modelled on a pre-WW2 Standard, apparently made in Germany by Haenel. With thanks to Mike and to Lawrie for facilitating.
Here are some extraordinary adverts (thanks to Tantomurata) showing what purports to be a "BSA" repeater on sale in Japan, although you can clearly see the German-style front trigger guard extension. Tantomarata says it was "listed in 1930 by the Tokiwa-Go Arms Co. in Japan".