https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=267208&page=all

A bit more discussion on the >>Viennese style forend lever(Rigby style forend lever(British patent no. 1793 of 1866 - Charles Harvey)/S. Matthews provisional patent 3573 of 1878<<

Serbus,

Raimey
rse