Dwarf brass corrector magnet holder for Type O.2, observer's compass fitted with four tubular tubes fore and aft and four athwartships for 2" horizontal magnets. A sleeve, with spring catch, covers the holes for inserting the magnets in tubes. There are two slots for locating the base of the compass. Base of the holder has three holes for securing in position. A scale on base plate flange allows for fore and aft line adjustment.
O.A. Height 2.15" (5.4cm)