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Prim chaincase.

A question; the filler cap on the M20 primary chaincase; was the hole in the chaincase bigger on the WD models than later, after the war ?
Or is the hole the same size ?
(I believe in the war they were made off brass and after the war made off aluminium)

Re: Prim chaincase.

They were the same size until 1948, brass during the war and aluminium but the same pattern until the '48 season...After that a change was made to the smaller diecast cover as on A10s, B31s and most of the range....Ian

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