This is a Kendrick & Davis 66 punch in very good condition.

The body is in great shape.  The tip is too, but it has a slight discoloration on the end face that lemon & salt didn't remove.  It doesn't feel like corrosion... maybe a stain of some kind?

After removing the tarnish, I applied a thin coat of Boeshield T-9.

I'm happy to send more close-ups of the tip.