Gentlemen

I am attempting to identify who may have built an 'under and over' rifle, in .350 calibre, which was bought in by a London gunsmith in 1912 and sold in 1913. The gunsmith finished the rifle themselves and sold it for 42, I would assume using their own name. The only clue is the word 'Mueller' in the company's books.

Whilst I realise that we shall probably be unlikely to pin down the original maker, I would like to have an idea of some of the firms making o/u rifles at that time, presumably in the German, Austrian or Swiss region. Please note I have no photos and do not even know if the rifle is still in existence; but I am curious!

Does anyone have any ideas?

Tim