Ok I found that No2 is a climb and descend indicator and their value are waaaay higher than 20gbp.
Two to go!!
I'm not an expert but hears my thoughts...
The Air Ministry ones may be ww2, the one with the broad arrow is almost certainly post war.
As two are for low knots and one for attitude I suspect they are from gliders (apear to be cable operated)... So could come from air training corps (new old stock).
Personally I think £20 for the 3 is a bit of a shot in the dark.
Sorry I can't be more helpful.
Thank you for your input! I'm currently searching online at spitfirespares.co.uk and they have some gauges with that broad arrow stated as war time!
CORRECTION!
...as early post war! Sorry!!!
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