IWI the successor of IMI doesn't have old records from what I could find.
mod A uzi will not have a safety on the firing pin on the back of the bolt. mod B's do.
http://www.uzitalk.com/reference/pages/ABdiff.htm
From B B free search page:
"CARBINE MODEL A
9mm Para. cal., semi-auto, 16.1 in. barrel, parkerized finish, 25 shot mag., mfg. by IMI 1980-1983 and ser. range is SA01,001-SA037,000."
Looks like Model A SR#s below SA37xxx are pre-ban.
"CARBINE MODEL B
9mm Para., .41 Action Express (new 1987), or .45 ACP (new 1987) cal., semi-auto carbine, 16.1 in. barrel, baked enamel black finish over phosphated (parkerized) base finish, 16 (.45 ACP), 20 (.41 AE) or 25 (9mm Para.) shot mag., metal folding stock, includes molded case and carrying sling, 8.4 lbs. Mfg. 1983 - until Federal legislation disc. importation 1989 and ser. range is SA037,001-SA073,544."
Looks like Model B SR#s below SA73xxx are pre-ban. So, SA66xxx should be a Model B and also be pre-ban?