I like it. I had to get my zoom on, London Pride, nice. The c in the shape number is for the curved stem. One finds other shapes like this, the 337 being an example for instance.
The other thing, I think there may be other shape numbers, just a guess, as the auction pictures are not clear. I can see the MADE IN lONDON over ENGLAND COM stamp.
Very cool - Dmcmtk get a cookie! That one is didn't make any of my shape chart, so even cooler! (I'll update the title on this one, and the Sunrise linked above)
https://www.youtube.com/watch?v=OXA338ro1mo