I just purchased a lot of 3 regulators, and one is a Dacor C-3. This one looks rough, but I have enough parts to make a pretty presentable regulator, and certainly a fully functioning one.
I like me a C-3. They are pretty solid breathers. For the newbies on the board, Dacors are different, and have very unique first and second stages. There are lots of DH Dacor threads archived here on the board, but we need to keep them current.
If I can get a rebuildable regulator cheap enough to fix it and sell it for a couple of bucks over what I paid, I'm happy. I have a lot of service parts as well as odds and ends, so finding regs that need them is one way of paring down the junk.
And, I love getting them fixed up and working again, even if I have little interest in keeping them. But, I have slowed way down on purchases and have sold or given away most of my regulator collection.
PS, I just told Phil that I would not be taking this C-3. I already have one, and it is converted to an R-4, but Phil's would probably simply sit on the shelf rather than being used. So this one is still up for grabs.
It has been hanging fire for a week or so, but the C-3 is now finished. It sports a James-made main diaphragm, a NOS duckbill, and a new repro HP diaphragm. IP has been set to 125 psig via the custom IP adapter I made waaaay back when I first started machining parts.
I turned the LP seat over for a fresh surface and superglued it in. It looks and works a lot better than it did!