Who Pedantry....
It is from a Special Weapons Dalek from their last appearance in the classic series.
(terryeden, Thu 21 Aug 2008, 13:00, archived)

Ah, that'll be Colin Baker then will it?
I could've googled but my memory thought it was Remembrance, not Revelation...
( WiL is addicted to BestOfferBuy dot com, Thu 21 Aug 2008, 21:07, archived)