Gyro-Compass Mark Xiv , Mod. I

Brooklyn, New York: Sperry Gyroscope Company, 1944. First edition (presumed; no earlier dates stated). Dark green octavo or small quarto, 2-screw binding, iii, different page groupings, approx. 200 p, chiefly b&w illustrations (including diagrams); 24 cm. Very mild rubbing to spine head and foot, very gently bumped and rubbed corners, very light soiling to title page and front endpaper, light soiling to boards, else Very Good. Hardcover.

Compass, Electric, Technology.