Model M21 a1
setName: label: See more items in
content: Military and Society: Armed Forces History, Military
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: AF.814698
label: catalog number
content: 814698
objectType: label: Object Name
content: Shell
label: Object Type
content: shell
label: Other Terms
content: Shell; Ammunition, Artillery; Center Fire; 20 Mm
physicalDescription: label: Physical Description
content: metal (overall material)