I agree with Mike and Chris. Don't replace the compass. Here are a few compasses used over the years and some very rough dates. As you can see, compass styles changed and the compass should match the vintage of the knife.



a) 3/4" possibly Stocker & Yale, brass, dry, late 40s to late 50s
b) 1/2" Waltham or Marbles, brass, dry, 50s into 70s
c) 1/2" Marbles, brass, dry, early 80s to mid 90s
d) 1/2" Japanese made, plastic, liquid, '96 to present