Thanks for the replies.
I have listed 110 serial numbers and have a few thoughts on the results.
(1) There must be many Airsporters still out there, owned by non BBS members.
(2) Some members may choose not to display the information, which is quite understandable.
(3) Very few .177's recorded. Out of the 20, I have 13 of them and two more are one's that I have sold.
(4) I have still never seen or heard of an ED model.
This list is not as conclusive as I would have hoped but maybe more will appear (hopefully).
G:- total 17 - 2213 to 32657
GA:- total 4 - 951 to 5080
GB:- total 16 - 4160 to 16539
GC:- total 5 - 244 to 3302
GD:- total 37 - 3821 to 34838
GE:- total 8 - 1283 to 2213 & 40628 to 44761
GF:- total 3 - 883 to 2786
E:- total 4 - 8909 to 12028A
EA:- total 3 - 13036 to 17481
EB:- total 1 - unreadable serial number
EC:- total 3 - 2233 to 2439
ED:- total 0
EE:- total 7 - 1293 to 7516
EF:- total 1 - 10011
EG:- total 1 - 68
Thanks again for your contributions - Roger