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Danny42C ... except that ...
A similar contra-rotating propeller unit was later used on production Seafire 46 and 47s.
In the Bar at Manby, Plt Off MPN11 engaged with a lively discussion with Gp Capt Norman Hoad [who was doing a refresher Course, IIRC] on the subject of Spitfire propellor blades, and he retired to his room to produce a photo slide. On closer examination, he admitted "Dammit, you're right - have a souvenir!" and gave me the slide [now sadly lost].
I think the Griffon Spits are simply gorgeous. That long nacelle adds grace to the overall profile ... and a lot more oomph!
https://en.wikipedia.org/wiki/Superm...wered_variants)