What do you want to know?
There is no such thing as a 70 series commander. It applies to the collet bushing that was made in the 70s. Your commander was mfg. sometime in the 70s without the that type of bushing.
That colt commander with serial # 39487LW was produced in 1959. (39450LW-41500LW) mfg date is 1960, not sure if '70 or '80
About $700-$850, depending on exact version and condition.
500 to 700 dollars depending where part of the US you live in.
value depends on overall condition.............
0-1400 USD depening on condition, box, papers, accessories, etc..
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
You will need to call Colt
You will have to call Colt to find out.
the original colt gold cup 70 series is worth about 1,000 dollars roughly
Depending on a detaliled description, it could be from 500-1000
100-1000 USD depending on specifics