Pete:
Just copy another image right below it. Is that an "ACL"/"ACM"/"ACN" encircled and what is the stamp just above that? Also there is another encircled set of initials on the right tube near the lower rib? By the scribbling("70" beside chamber info & "IC" & "Mod"), someone has lengthened your chambers as well as noted, or modified, the chokes(I now see that in your post).

Kind Regards,

Raimey
rse

Last edited by ellenbr; 02/02/10 07:43 AM.