Hi!

Anyone correct me if im wrong but i think the nimrod was a maker that started building one of the sidelocks with a second hammer instead of using a blitz or boxlock style for the third barrel.

They had also a sidelock of their own "special stile" and a action that beside the ordinary locks and greener crossbolt hat a protrution under the barrel at the lump that went into the action.

There are some older drillings like the collath, nimrod (Theme & speigelmilch) that also are chambered for a 9,3mm-82r nimrod cartridge.