Condition Report For Lot# 257 :
Phenolic or Bakelite case mounted in a heavy metal frame with a viewing window and a mechanism for mounting one of four cams (missing) to allow the helmsman to steer a predetermined constantly curving track along a base course as a means of protection from submarine or air torpedo attack. The case is in very nice condition with a very fine dial. Original hands. Ht 11 1/2"