I have never heard of a Lincoln Super Comet but the Original mod 45 is a great break barrel air rifle!
They have decent power and fairly simple to work on. If you look on the left hand side of the cylinder near where the metal meets the wood and closer to the trigger than the barrel. You should see a couple of numbers. For example '8 81' This would indicate what year it was made with '8 81' meaning August 1981.