Right off, I don't recognize Büchsenmacher P. Werlig in Österreich, buy maybe Jani will chime in.... But from the marks I can read & if it does not wear a preliminary datastring on the lower rib, I'd hazard a guess the Jones Underlever platform experienced proof between 1891 & 1897. Better image of the chalked marks & water-table might net you some info?

Cheers,

Raimey
rse