WWII US Navy Rude Star Finder & Identifier, With Case, "Restricted," March 1942, Original.
H.O. No. 2102-C / HYDROGRAPHIC OFFICE / STAR FINDER AND IDENTIFIER / RUDE STAR FINDER AND IDENTIFIER (With Hydrographic Office Modifications)". This star finder, designed for aeronautical use, was based on the Rude form as modified by Elmer Collins of the United States Hydrographic Office. It consists of a white plastic planisphere with the northern sky on one side and the southern on the other that shows all the stars in the American and the British Air Almanacs; seven clear plastic altitude-azimuth templates for use at different latitudes up to 85o north and south (it is missing 2 of these); an instruction card; and a leatherette container. It was published in March 1942 under the authority of the Secretary of the Navy.
The black leatherette case is a bit dry but has no cracks or tears and the stitching around the perimeter is sound. The front of the case is embossed "RUDE STAR FINDER AND IDENTIFIER" and "No. 2102-C HYDROGRAPHIC OFFICE (RESTRICTED)", which is faint. the contents inside the case are all fine and have no cracks or tears. The contents inside the case are all stamped "Property of Lt. Louis D. Vagi".
Just what you need to fill that void in your WWII Navy Aviation collection. Condition Very Good Plus.