microammeter
Datec. 1925
Inventory NumberWJ0468
ClassificationAmmeter
Subject
Maker
Rawson Electrical Instrument Company
1918 - 1968
Dimensions10.3 x 21 x 19.7 cm (4 1/16 x 8 1/4 x 7 3/4 in.)
Signedwritten in red on front, left: 0-100/ / 1000 (greek letter mu) a
on dial face: RAWSON ELECTRICAL INSTRUMENT CO. / CAMBRIDGE MASS. / PATENTED / NO. 7891 MAY 15, 1923 / APRIL 14, 1924 / TYPE 501 / MARCH 3, 1925 / OTHERS PENDING / MAY 15, 1928
Inscribedwritten in red on front, left: 0-100/ / 1000 (greek letter mu) a
Rawson Electrical Instrument Company
Date: circa 1930
Object number: 0428
Weston Electrical Instrument Corporation
Date: 1901-1930
Accessories: standardization certificate on inner surface of lid
Object number: 1997-1-1101
Weston Electrical Instrument Corporation
Date: circa 1931
Object number: 0528
Weston Electrical Instrument Corporation
Date: 1920-1930
Accessories: shunt attached by hooks to electrical connectors on top
Object number: 1997-1-1039
Rawson Electrical Instrument Company
Date: circa 1939
Object number: 0568