Certification and Certificate Files
name: label: Collection Creator
content: Duffy, Harry A.
label: Collection Creator
content: Duffy, Duane A.
label: Collection Creator
content: Duffy, Glenn E.
setName: label: See more items in
content: Harry A. Duffy Papers
unitdate: label: Date
content: 1560-2003, undated
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.1162, Series 4
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents
content: This series contains certificates and related certificate files. Certificates are documents that attest to the maker and provenance of an instrument. It will often include information from other certificates and have the measurements and qualities of the instrument in question. There will also occasionally be the sale history of the instrument and prices paid. Certificates are duplicates of ones issued by Duffy, files also may contain earlier certificates related to instruments in the files, as well as correspondence and historical items pertaining to that particular maker. Files are arranged alphabetically by maker, date ranges are the manufacuture dates for those certificates in the file.