The 3 outer screws on the black ring of the compass, 120 degrees apart, hold it to the off-white barrel or ring. There may be some sealant from a PO as well, so you might have to gently pry the compass up. Once the compass is removed from the off-white ring, you will see there are 4 more machine screws inside that hold the off-white ring to the top of the pedestal. The compass and off-white ring would have been by Hunter - the rest is a stock Edson pedestal. Pedestal manual is online at their web site.