I doubt the compass can be replaced. Those old Marbles compass' are almost impossible to find anymore. The new ones are liquid filled and totally different size diameter. Just leave it alone if the toothpaste doesn't work. Nice find, regardless.

Pap
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Mike Allen
RKCC-CM-086
True West Magazine Maniac
Randall Collector
Behring Made Collector
Ruana Collector
Glock Fan
NRA- Life Member since 1975
mikenlu99@aol.com