Miller, as I recall, the 7 D has the boxlock action. I have not checked the O Excelsior. Off the top of my head, I do not remember how to tell without removing the trigger plate... something else I need to check out. If you have Robert Elliot's second book, "Uncle Dan Lefever- Master Gunmaker", the cocking mechanism of my 7 D is shown in the top photograph on page 98.

The inner workings of my 7 D were also pictured in a Double Gun Journal article by Keith Kearcher. I would have thought this gun never had a screw turned until I saw it partially disassembled in that article, and recognized the very low serial number. Just goes to show what is possible with correct hollow ground screwdrivers and good technique.

Voting for anti-gun Democrats is dumber than giving treats to a dog that shits on a Persian Rug