Well, I bought it. It'll be here in a few weeks. I got for very good price, Komrade!
This one is a 2 stage regulator. It has some interesting knobbly things on it. There is no HP port, but I think there is a way to connect LP peripherals. The chrome thingy with the holes must be an OPRV. According to the Soviet Manual of Scuba Diving, this is an inferior model because it can't be used with a hand pump on the surface!
Just to keep relevant info in this thread: I posted in the AVM-3 thread that Sportsways DH wagonwheels are a perfect fit inside the Soviet metal mouthpiece, making it simple to fit non-returns in the Russky hose loop. You just have to file a U into the flange to fit around the mount for the rubber mouthpiece that is soldered into the body so the ww will fit flush with the threaded boss. I will post pics.
It might be possible to re-invent this with singlestage parts of some kind. I'm not going wayyyyy... out, just thinking some single stage parts may fit into that second stage? But why? I am committed to getting a first stage hooked up to this and getting the thing working that way. Other mods can come later. This might be a very cool DH platform when coupled to a first stage with all kina ports. The fact that it is a second stage only regulator has some cool implications!
So bringing this thread back to the AVM-1M, I got the reg a couple days ago. It is missing the DIN connector, but one has supposedly been shipped to me yesterday. I should see it in a couple of weeks. Hopefully...
I'm curious about how it breathes. Others who have them say they're pretty good. I'll post some teardown pics soon.
But Phil... why do you want this, it's so hard to get parts for
But seriously though, thanks for sharing this with us: it's very refreshing to see something totally different!
There are some parts available on eBait and probably some hard parts available from the vendor. I am looking forward to the teardown on this. I've already seen some things that are making me wonder about the way this works. I'm thinking it might be an upstream 1st stage, but I'm not sure yet.