Cap jewel with what looks like a circular engraving around the edge

[mikepilk]

22 minutes ago, VWatchie said:

What's the diameter of the opening? Would a large part, such as a setting lever spring from a pocket watch, fit? How do you treat pallet stones? Do you place the entire pallet fork in it?

Width of the opening is about 19mm. I only use it for parts like the escape wheel.

Cap jewels are hard to find. So I usually put a drop of fixodrop in a small glass bottle (5ml), then hold the cap jewels in tweezers and dunk. Similar with pallet jewels - I hold the pallet with tweezers and dunk just the jewels. 

I used do it by pushing the pallet in to some pithwood, jewels up, and sit the cap jewels on the pithwood, then using a small syringe, drop some Fixodrop on. But this method is more wasteful of the precious fluid. Using the small bottle I can tip it back.