Actually AR213 is being restored again back to stock Mk I standards with the slab sided canopy, 3 blade De Havilland prop, fish tail exhausts, bead site etc.
Postwar often times the guys flying warbirds used what was available and 4 blade props and multiple exhaust stacks were easier to come buy. It's only really been about the last 10-15 years or so that people have really gone the extra mile to restore warbirds back to their original condition.
AR213 did not ever see combat as by the time it came off the production line the Spit V was the front line Spit, but it was flown often by B of B Ace Ginger Lacey while serving in an OTU for new Spit drivers.
It's expected to be up and about in the next year last I heard
