The Colt National Match pistol with serial number 26-NM was produced in 1965. Colt National Match models were specifically designed for competitive shooting, and the NM designation indicates that the firearm was crafted for enhanced accuracy and performance. The production of these models continued into the late 20th century, but the specific serial number you mentioned corresponds to that year.
1st stage 26nm 2nd stage 90 degree 3rd stage 90 degree 4th stage 90 degree
Main bearing caps==Oil the bolts and tighten to 88Nm. Con rod caps (big end)Use new bolts,torque to 25Nm + 100 degrees + 15 degrees. Flywheel bolts 30Nm + 45 to 60 degrees. Need angle guage for two previous items,or can mark out a card disc. Oil baffle to cylinder block 26Nm. Oil intake pipe to block(new O-ring)19Nm. Sump bolts 10Nm.