Go to web site listed below and scroll down to Colt MKIV Series 80 & 90 It will provide you with the manual in pdf form.
http://stevespages.com/page7b.htm
Colt data at Proofhouse.com
$900
Call Colt and they will tell you.
50-650 usd
100-600 usd
You will have to call Colt
100-600 USD
100-600 USD
proofhouse.com
$450.00?
@ 1978
10-500 usd