Sorry for the late reply.
I have my early model Baltimore Arms disassembled for some repair and cleaning. I try to lay out the parts and take pics when I have projects apart. Here are some views of my A grade #1517.
The V spring at center is the top lever spring. The grooved pin w/coil spring just below the Frame is the top lever trip.
This pic shows the Cocking Arms on the Hammers and also the hanging sears, sear springs and sear pivot pin/screws.
The main springs, sitting on top in the pics, actually set below the hammers with the hooked end of one leg captured by the false bottom plate.
The false bottom plate slides into the frame from the rear and is retained by the demple at front center. Once the trigger plate is attached the false plate can not move. The trip coil spring sets over a small tab in the plate between the mainsprings.
Hope this has helped you understand the inner workings a bit better.
John
