900 Club Forum

I finally got the tape measure out the other day, the result of the survey:- http://i1139.photobucket.com/albums/n556/Captdick1/DSCF0960_zpsf74af972.jpg 543384 offset is 2 7/8 ins http://i1139.photobucket.com/albums/n556/Captdick1/DSCF0959_zpsed0df32d.jpg 569203 offset is 3 3/4 ins http://i1139.phot...

I have just had 6 rims blasted and revealed the following numbers:-
543384 - I believe are 2a FC rims (correct?)
569203 - 2b rims (correct?)
and 503489 which I can't find details of anywhere but appear to have the same offset as 543384, anyone any ideas on where they are from?