Lee,
I am anything but an expert on vintage Remington rolling blocks, but my great grandfather had one and I was always told it was a model 4. His was in 32 rimfire IIRC.
I couldnt find any google images of a Remington 1 1/2 having a toggle on the right side, but lots of model 4's that do. I believe the toggle is the takedown lever
Interesting piece of history none the less
Last edited by MallardAddict; 08/25/16.