Well, I just haven't made any enroads to info on ole Büschenmacher Puskaműves J. Seifert in Bratislava. Maybe some member can be so kind as to check Der Neue Stöckel??? He must have been some obscure firearms merchant for which information has been lost to the ravages of time.
But I can say that before the 2nd Major Dissagreement in Europe, there was some spectacular Pigeon(Holub) shooting in Totmegyr and around Britislava where Britislava Pigeons fed on pea & corn fields. But that train has sailed......
I don't know that there are any tid-bits of info on the superb Pistol Shooter Denk's thread, who advertised as »Vereinsbüchsenmacher« Franz Denk, but maybe Seifert was mentioned in some of the references.......
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=647056&page=allSerbus,
Raimey
rse