Hello,
I have 2 magnetic compasses, one of which for some mysterious reason has reversed polarity ie. red points south!!!!
Pic here:
The LH compass is a really nice 35 year old SILVA "Type 4" that points precisely 180 degrees in the wrong direction. I have no idea how this happened.
Bear in mind the needle is in a sealed oil filled housing, it is not practically possible to dismantle it!
Can anybody suggest a non-destructive method to correct this?
D