Pettifogger said it all...
For actual hands on, I had a 1979 SRC in 38 , no Comp, but I did shoot it some.... no issues, sold it in 88 still functioning and looking fine.
I had traded for it in "81" , so I was in it at about $300 sold it for $375....
If you are get in at those prices go for it, if you are looking at $ 600 or more, save your $$ and piece of mind, get a later Date Code.