All hammerless Lefever Arms Co guns have their hammers mounted solidly to the frame. Early models had the sears mounted on the side plates. Later ones with the large single cocking hook have the sears frame mounted as well. Never-the-less they are not simply boxlocks wearing "Falsies".
The side plates give access to the lock works & the layout of the hammers & mainsprings are like a bar-action sidelock, Except they aren't mounted on the plate. Sear notches on the hammers are located on the outer periphery f the hammer rather than close to the axle for much more secure sear purchase.
I too abhor a normal Boxlock with falsies but do not see any feature on the Tobin which would lead me to trade a good Lefever for one, even if it were originally of a higher grade. The Lefever has a better frame shape, both for handling & aesthetically & is Stronger. In short, the Lefever is about the best of both worlds with advantages of both the Box & Side lock guns.
