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My second post. Hopefully I get a response to this one......

The Pace Comet that I'm restoring has some very hard rubber. One is for the return on the pump handle and the other is when the handle is pulled down.

What do you use for a rubber replacement? I've tried rubber from erasers and they seem too flimsy.

Search the plumbing department at Home Depot and you maybe able to find some rubber products that you can cut some bumpers out of. I found one piece that is about 1/2 inch thick that I've cut bumpers out of it.

The best thing for you to do, is punch-in Rubber Mfrs. on the internet. There are plenty of them.
Check their product listings, or better yet, call them. Many of the larger companies, will have a
supply of rolls, of different style solid rubbers. I once dealt with a supply house in S.F. Cal., and
was able to acquire solid black rubber, in many shapes & sizes, from a reel, by the foot. This is
the best way to go, and saves you from having to cut small pieces, from a chunk, then having to
sand and shape it to your needs. Good luck.

Go to a store that installs windows. They set the glass onto a rubber block at the bottom of the window frame. I used one of these blocks, cut it with a hacksaw to fit the handle cushions. Shown are the original hardened rubber stops, and the block that I used to fabricate copies of the originals.

I have had a couple of these same hard rubber blocks that you show here, for a long time, that I
have cut bumper pieces out of, but never knew what the original purpose was for them, or even
where I got them. Thanks for letting us know. That's what I love about this Forum!

Actually I found out about these blocks by accident. I had an 8 ft by 3 ft. window removed from a wall in my business building to put an overhead door in its place, and when we removed the window, these blocks were sitting at the bottom. I was going to toss them in the dumpster, but the light bulb in the head lit up. So I asked the door installers, they told me they're a common piece that they use to set windows.

The four pieces I saved will last for many machines. Just the right hardness too. And they are half inch wide, perfect for the slot handle stops.

I just noticed that Berten's catalog lists replacements for the rubber handle bumper on the case, and a choice of either rubber or leather for the bumper on the mech - any of them listed at just a buck and change, plus of course shipping.