Hi vint-mow
My understanding has always been to the top of the filler (on level ground).
I am unsure whether the specs referred to UK or USA pints.
The VK30 took 1� pints.
For UK conversion this would be about 700mls.
For US conversion this would be about 600mls.
My best guess is that this US design took 600mls, and the AUS
specification was expressed in North American pints.
Hope this helps.
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Jack