All

This tool was found in a box of very rusty tools.  You can see it here in
the midst of a pile of tools, kinda greenish, and without any definition.
This was cleaned without any mechanical advantage, only soaking and
scrubbing.  I figured it was completely trash as it sits there, so almost
anything was fair game

https://kirkhmb.smugmug.com/Woodworking/Woodworking-Tools/i-wrQRMww


The after effect of using a razor blade to knock off the really gross
stuff, a bit of Simichrome, and scrubbing with a coarse Sand-Flex block,
got it down to the point where I could read the Central Tool, and Germany,
so I figured it was worth a bit more effort.  Could not get the slider to
move, so tried tapping it a bit, only to create a ding in the slider, far
right.  Decided to throw it into my Simple Green bath, and let it soak for
a few days.

After the first few days, it looked pretty good, but the slider still
wouldn't move.  So I clamped it by the bottom in a rag, in a vise, and took
a small punch, and since I could now see the dovetail outline of the
slider, I was able to deliver a few gentle taps, and it started to move.  A
few more taps, and it was out.  The mating surfaces were still quite gross,
and not wiping clean, so I threw it back into the SG.  Took it out a night
or two ago, and scrubbed it a bit more.  Still not perfect, but it moved.
As I started to clean it, I could see that the finger nub was going to
create a shadow where I couldn't clean very well with Simichrome. So I
tapped it out, and it bounced out of my catch bin, to disappear into the
crap on the floor, so I needed to make a new one.  Took a bit of 3/32" rod,
ground and filed the end to be finger friendly, then tapped it back
through, kept tapping until it was a good height.  Then trimmed off the
back, and filed it flush.

The final picture is here, and I decided not to take it any further.  The
blotching is seriously deep pitting, and I don't want to work on it any
further.  The markings are much nicer than the cheap India-made one I
posted a while back
<https://kirkhmb.smugmug.com/Woodworking/Measuring/i-cZkLFRw>, when Bill
Ghio stirred everyone up with his cool calipers.

https://kirkhmb.smugmug.com/Woodworking/Measuring/i-KXM6pzG

Thanks for looking, and apologies for over cleaning, but this was a
resurrection, so he doesn't need much patina.

-- 
Kirk Eppler in Half Moon Bay, still moving about  and cleaning tools.