Help I'd u boat items

[hayleyp]

Can you I'd these items thanks

[Marflower]

It looks like a pressure regulator for compressed gas. Made by Drager. Reduces from high pressure 100 -200 kg/cm from cylinder tank to more manageable pressure. Hence the 2 dials.

[hayleyp]

Ok

Ok many thanks

[Marc verstraete]

Drager Pressured air manometers from a regulator transforming High pressure air in lower pressure air.
Not necessary KM except of there is a KM stamp on the device. Not necessary wartime also ...

Drager kade and still make breading apparatus for all branches of services as well as industry and civilians .
Marc