MG Fire Simulator? Seen on eBay UK

[Flying10uk]

I haven't seen one of these before, what the vendor is claiming to be a MG fire simulator.

I would have thought that another possibility for this item might be a variation of the gas warning rattle.

Any thoughts?

WW2 Home guard WW1 MG Fire Simulator LDV Home Front Vickers Lewis Bren Thompson | eBay

[Warren]

I have not seen one for over 60 years but they are LOUD
I recall cranking one in a surplus store and almost got chucked out on my ear!!!!!

[Sapper740]

Not a gas warning rattle. The gas warning rattle handle could be held in one hand while the rattle spun around it as seen on P. 384 of David Gordon's excellent "Equipment of the WWII Tommy".

[Peter Laidler]

Yep, it's a 'Simulator, MG' There were a few different variations. Not quite as effective as the real thing I've been assured.....