I'm not sure if Colt even knows. You could call them and ask, but, don't expect an answer.
Colt sells them.
You will have to call Colt to find out.
50-500 usd
You will have to call Colt. Published serial numbers stop at 1978
No way to answer without a serial number.
Follow the instructions in the owner's manual. If you don't have one, call Colt and they will send you one.
No published data for sn; 50-750 USD
Late 1980s or early 1990s
@ 1973
Anywhere from $1100 in 100% condition to $450 http://www.usedprice.com/dropdown.php?catname=gun&mfrid=&typeid=&itemid=&query=Series+70+Lightweight+Commander&x=33&y=17
1966
1968