Rabbit Leader...
The quote is verbatim. It doesn't actually say "The Prototype", merely :
THE Issacs Spitfire
So, whether it actually is'JI, you can't tell. Unless of course you ring the chap up.
I'm not going to give out the details here as :
1) I don't want the chap bothered by "time wasters" And
2) I'd rather like people to join the PFA
Rgds BEX