Looks like we haven’t played the regulator ID game in a bit...

[texspeleo]

I don't think the knurled knob is stock.

Here's a manual. The MR12 stuff starts on page 25.

Thanks very much! I’m curious if the internals match up. I suspect it might be a copy by another company. I’m certainly no historian on the topic, but gathered from watching posts over the years that Dynasub sourced parts from many places (hence the Superflow seconds), and many companies in Italy were producing gear during that time period that never made it to mainstream US markets.

 

[lowwall]

If this is an MR12 with 1 HP port, it probably doesn't have a replaceable HP seat. Mares says these are no longer serviceable, but you can try a new poppet (part 9 in the drawings on page 25 and 27) and see if the IP stays steady. There are multiple generations of the poppet, I'm not sure which one will seal best against the old seat.

I just realized this was only an update manual, so most of the pages are missing. I'll see if I can find an older one with more MR12 stuff.

You also need an R2 drawing. That was Mares' budget piston reg. The bodies are very similar.

 

[lowwall]

Found them.

 

[texspeleo]

It appears that mine are an older generation if they are MR12s. The pics that I’m finding have a concave curvature at cap of the regulator body, and mine are conical and flat.

 

[texspeleo]

Thanks for those as well!

 

[lowwall]

I agree. They don't look like Mares regs to me. I'll be watching this thread with interest.

The DynaSub regs I could find pics of all had a reg body with a smaller diameter than the yoke.

 

[texspeleo]

Not holding my breath that they can be made functional.