Type I-10 (1909 to 1913) Previous
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The I-10 was developed for metering low-capacity residential loads. This meter was of a completely unique design and none of this meter's features were incorporated into any later meter made by GE. The register on all I-10s had only 3 dials (except the 25-amp capacity model which had a more typical 4-dial register). The brake magnet was very similar to what was used in Duncan's M2 and MD meters, but the iron piece under the disk was fixed, the full-load adjustment being a screw that moved within the magnet's air gap. The light-load adjustment was the usual moving plate, but there were two clamp screws on the sides of the frame for manually positioning and locking the plate in position. This may be the only model known where the cover screws into the base like a jar lid. Most known I-10s have a metal cover as shown, but a couple examples are known with glass covers.
 
I-10, 3-dial
David Dahle collection
I-10, 4-dial
Seattle City Light collection