You will have to call Colt and tell them the serial number.
According to info available on ar15.com, your weapon was manufactured in either late 1972 or early 1973. I own one made in 1974.
What is the manufacture date of a Colt AR15 rifle serial number 192754 model SP1
If the serial number is SP25002; 1973
2005
The serial number and possibly on the bolt.
No serial number given. You will have to call Colt.
$1599
@ 1975
I have an SP1 I purchased new in 1978 with a 108,xxx serial number.
value depends on condition
It was made in 1975