A MkII made of Bakelite for use on the home front which would have been purchased on your local high street. There’s no label on the inside so do not know the maker but it differs from Plastfort in that it has a thinner rim.
The liner is dated 1940 & made by VERO & is in mint condition, a piece of paper from the drappers record was tucked up inside the liner.
Aaron

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