Found some more technical data that looks like they can have an IP of 6-8bar...

I also read (from using Babel fish):
" The distributing F5 is a reducer of pressure micro to piston. Completely in brass chromium plateed with two escapes of low pressure contrapposte 3/8"UNF and attack DIN Ossigeno/Argon. Escape of DEVOUT: from 6 to 8 Bars Employment: dumb ideal as it arranges of connection for watertight the Optional: valvolina overpressure "

So it does indeed look like it only has 2 LP ports, and no HP side.

Maybe minimal use then in the big scheme of things - I may still get one and replace the Apeks (US1) reg I have on my suit inflate, and re-commision that for O2 use instead.