i have used the telescopic style, as well as the galilean type. both types were optically reasonably good. i could never get used to the difference they provided. it was kind of weird getting used to them. i ended up selling them off. ymmd
nice cleanup. it looks to be exactly like mine. strange that yours has no mfg. name. maybe it's a copy made by another company ? our resident historian, roger bleile, may be more able to nail it down for you
btw: i have an old leather donut you can have, no charge.
gimme a pm if u want it.
it looks like one i have, a muehlmat. a foto of the top would be useful. welcome to the forum. are you inerested in learning to engrave? if so, you've come to the right place.
what a blessing to have had that book when i first started ! my first gun jobs were home built front stuffers or store bought ones. i then knew very little of the history of design on those guns, and basically just did whatever the client hinted at. my cuttin was quite ok, but design skills...
unless there are scratches or gouge marks on the heel, the heel will not need touch up, just the face. if the heel is sharpened, yes it gets longer. long heels are to be avoided when doing tight curves. i don't know the sub milimeter dimension, but when you visually inspect the heel, one should...
sam: put on yer longjohns, it's cold up here. you can fiddle with my laser. mine is large enough to do most anything, including the one shown.
lasers have their place in this world, but not a trinket like that.
youre starting with the right approach by using the ring holder. for a first "crack " at this, i'd say you did rather well. you can practice on the cheap by cutting some old copper pipe to different sizes. you will gain lots of experience without breaking the bank.
look at a few videos of engraving in progress. that will give you an idea as to how to hold your hand. as for cutting curves, a short heel is far better than a long one. the short heel will have far less tendency to gouge the edge of the curve.
as for grip pressure, not a heck of a lot is...
using a bit of lube will help a bit. also be sure you're not clamping too hard on the slide. doing so, the slide may be too tight when assembling the gun. easy enough to just hotmelt the slide onto a block of wood. isopropyl will release the hotmelt when you're done.
not sure, but the copy i have is only 1 page. that page does the calculating automatically. all one need do is enter a few numbers. nuttin else is needed as far as i know.