Weird mk10 on ebay?

[Whitrzac]

Scubapro Mk5 Spec 2 Enviro first stage regulator | eBay

<p>scubapro MK5 spec 2 enviro first stage regulator. </p><p>Pool tested , functions well , no leak down . As with all used scuba equipment this should be checked out by a professional scuba service center before used.</p>

www.ebay.com

Haven't seen one with this type of 'middle' section before

 

[runsongas]

early version of the TIS system iirc

 

[Kupu]

It is a MK5 outfitted with the optional environmental kit Scubapro sold for a few years in the early 80s.
I have a couple of these and think it is a nice solution for sealing the MK5.

 

[happy-diver]

Wow!
How's this for SP catalogues

 

[John C. Ratliff]

The MK5 outfitted with the optional environmental kit by Scubapro is a great setup, and I have used one for years. However, when putting the silicone grease into it, you need to do that when it is under pressure. If not, the piston will move and the overfilled cavity will squirt the silicone grease all over, and even by the O-rings into the interior of the regulator.

SeaRat