value depends on overall condition
500-900 uSD
@1964
No way to answer without the serial number. You can call Colt and they will tell you if you provide the serial number.
1974
Proofhouse.com has Colt sn data.
Impossible to answer without the serial number. Call Colt and they will tell you for free.
1000 USD
1970
You must call Colt with the serial number to find out.
1977.
Looks like a 1975 SP1. Here's a link to Colt Ser# http://www.biggerhammer.net/ar15/ar15serial.html Good luck 7.62
NOT SURE OF YOUR MODEL, MY BUDDIE HAS AN ORIGINAL COLT AR 15 ,ITS WOTH $2000 IN CANADA