Good example of nickel covered compass dividers made by Weems Plath Germany most likely used by Students at Naval Academy in Annapolis Maryland in 1960's. This type of instruments are used in maritime navigation by sailors. The well fitted case incorporates a combination of 2 instruments: one compass divider and one proportional divider and a small adjusting screw driver. The case is in excellent condition . Dimensions: 8 inches x 3 3/4 inches x 3/4 inches.