Betty Bomber Gyro Compass Tool Kit

WWII Japanese Navy Betty Bomber Gyro Compass Tool Kit. Dovetailed, wooden box. Painted on the cover in characters is  TYPE 3 GYRO COMPASS. When box is opened it is filled with various tools and weighted wooden pieces. In the center is some type of optical leveling tool. Attached to the inside cover is a spec sheet, that is pretty faded, with a couple of numbers inked in. Our guess is it is the maintenance tool kit of the compass ( but we have been wrong many times with our guesses). Also used for Vals & Emily's. Great shape RPR