B-20, 2 Cylinder Pump (Motor and Worm Drive)
name: label: Collection Creator
content: Mueller Machine Company  (Trenton, New Jersey)
setName: label: See more items in
content: Mueller Machine Company Negatives
label: See more items in
content: Mueller Machine Company Negatives / Series 1: Negatives
unitdate: label: Date
content: undated
container: label: Container
content: Box 2
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Negatives