Whatcha Al, One of these days you are going to buy a Curly off ebay! Right I asked the old man and he says that he thinks that's a 1951 frame number. according to him he says it looks similar to the 1951 Nulli Secundus Earls court show model finish. They were either all chrome or flamboyant paint over nickel plate. The traditional pre-war way of flams. Hetchins were the only maker post war who carried on this tradition and each of the models on display would have had a matching lugged extension Will post it on the CR list for you as well. There are plenty of Hetchins anoraks on there who will mo for certain and can go into much more detail. ATB and be lucky Mick.
Thats all for now. Keep those wheels spinning, in your memories if not still on the road. Be lucky Mick Butler Huntingdon UK.