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Catalog Number 1973.304A-I
Description Anti-Aircraft Shells, 1940. Six empty shells (A-F), two metal bullet heads (G,H), and one metal ring (I). Empty shell casings are cylindrical in shape and open at one end. Closed end narrows then widens to flat bottom with a raised ring. Flat bottom has two etched rings in center with text around rings. Two metal bullet heads are small and have oblong oval shapes. The metal ring has threading on the interior side.
Object Name Shell, Artillery
Collection 3D - Armaments
Title Anti-Aircraft Shells, 1940
Date 1940
Creator Unknown
Role Manufacturer
Inscription Text (A-F) "FS [Partial Text] 1940 / 20 M.M. [Partial Text]" (Engraved text on bottom of shell casing)
Provenance Collection of 50-Caliber anti-aircraft shell cases from Pt. Montara during WWII.
Notes "Air defence is defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action." They include ground-and air-based weapon systems, associated sensor systems, command and control arrangements and passive measures (e.g. barrage balloons). It may be used to protect naval, ground, and air forces in any location..." [ 8/11/2015]

"The United States Navy operated an anti-aircraft training center at Point Montara during World War II..." [,_California#History 8/11/2015]
Dimensions H-3.875 W-1 D-1 inches
Dimension Details (A-F) 3.875 x 1 x 1 (G,H) 1.125 x 0.375 x 0.25 (I) 0.875 x 0.875 x 0.25
Search Terms Gun
World War II
World War Two
Subjects Arms & armament
Artillery (Weaponry)
World War II