Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Keuffel @ Esser Co.USA
p. 192712.5 cmEngineering

Notes: "1) Plastic Polyphase Duplex 2) Case has the name Henry A. Ravenscroft 3) This rule was given to me on April 20, 2019 by Richard Lyon 4) 57 years before I attended an engineering class taught by Mr. Ravenscroft at Santa Rosa Junior College 5) The words ""Petaluma California"" also show on the case 6) See Mr. Ravenscroft's obituary included"

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