I bought one of that type by a company called Gamn back in the late 70's. Looks exactly like the Timberline. I used it for about a year but then decided I did just as well hand filing. That went on until about 2010, when arthritis got to bothering me. At that time I had a hired man who did most of my cutting, I dropped the trees, he bucked and split. I showed him how to hand sharpen several times but he never got it right. I then just bought a bunch of extra chains. I had him change to a new chain as needed and just hand the dull one on a nail. I then got a Maxx sharpener and I'd sharpen 10 or more at a setting. It was fast and accurate. I still use it, no longer have a hired man. I do still carry a sharp file if needed in the woods, but most all sharpening is done on the Maxx (an Italian mfgr)
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.