Could not help myself but comment on this. The serial no. is within 9 digits of mine! Although the proof mark on mine is dated 1976. It was (is) an excellent rifle, bought it second hand in 1989 and went faultlessly until I 'retired' it in 2005. It has shot appx. 250,000 rounds and performed best latterly with midas L.
If this example is anything like mine it will make someone a good rifle.
Incidentally, although the trigger is the old design 2 stage, I found it excellent, never went wrong or required adjustment (I couldn't say the same for the modern replacement)
rgds
Skirmisher