Signedunder the scale: WESTON ELECTRICAL INSTRUMENT COMPANY, NEWARK, N.J., U.S.A." / MODEL [illegible] NO [illegible]
Inscribedabove scale: PAT. 1,579,849 1,597,256 1,661,214 1,714,065 1,714,202 / AMPERES A.C.
FunctionMeasures alternating electric current.