It also does not have anything listed under the W. Which I believe must have come after the Sperti Co. Anyway this I believe IS a RARE find & in great condition. Box is even pretty nice.
Does show some wear & may have some imperfections since it is most likely form the 1930's or 1940's. One of the blocks came unglued but is NOT broken just needs to be glued back on. Here is info I have discovered thru research. Used by pilots and navigators to determine accurate true heading by the sun or stars in arctic regions.It is well suited for aligning a boat's compass while away from shore-based magnetic interference. It is also useful to celestial navigators and amateur astronomers for identifying stars. It also functions as a pelorus with extremely fast operation. The astrocompass functions by means of measured movement in three independent axes. The uppermost member contains a peep sight for stellar use and a shadow bar for use with the sun.
The main platform is adjustable by reference to two integral spirit levels while mounted on the base. At high latitudes where magnetic variation can be erratic and the angle of magnetic dip can be steep, magnetic compasses are essentially useless. This instrument, on the other hand, indicates true north when pointed at a known star.It was made for military use during World War II, and surplus soon thereafter. Overall: 15 1/2 in; 39.37 cm. Overall: 10 in x 5 in x 6 in; 25.4 cm x 12.7 cm x 15.24 cm. Truly a great find whether you use it or just put it on display! Please keep in mind that the Key word Vintage so it may have small imperfections! Item in photos is example of what you will receive! I try to describe everything to the best of my knowledge but very few things I sell are Brand New. If it looks like a stain, nick, or fading in the photographs then it probably is. We believe the condition of these items is part of there charm. International will be charged accordingly if applicable.
(recommended on higher ticket items). Thank you & God Bless. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Field Gear, Equipment". The seller is "dsings14u" and is located in this country: US. This item can be shipped to United States.