How to tell if it is a real Rootes fire extinguisher

["Terry McKitrick" <terrymckitrick@hotmail.com>]

It will say "Rootes Group" somewhere on it
It will be rusty.
It will be overpriced.
The original paint color will be impossible to reproduce by any method known 
to man.
The operating lever will stick.
It will leak.

Terry McKitrick
Series I (non-original fire extinguisher)

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