This is not actually presented as a mystery object. Even to non anaesthetists this is clearly recognisable as a piece of anaesthetic equipment and any anaesthetist would identify it as a Magill type Mapleson A system, once the commonest system used in the UK for delivering anaesthetic gases.
It is now all but obsolete and you would have difficulty finding one unless you knew where to look.
The question is.
This system has found a new lease of life. A new niche. What is it?