Jim is correct, the heads are freshing heads a saw tooth design. As an aside, I have two original OTL guns by Elisha McCraner of Dark County one of which was lined by Weichold and Dave Taylor's personal .38 half stock. All of these are in 100% condition and shoot as well as when they were new. Bob, you are correct about Brammer working until, 1944. Before that he had transitioned into cartridge guns. I'll try to post better pics of the Brammer rifle.