Type MS (1969 to 1994) Previous
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The MS replaced the MQ in 1969 and was a complete redesign for a lower profile and to take advantage of further improvements in meter design. Among other small improvements, the adjustments were rearranged to allow for automatic computer calibration of the meter. Also, the light-load adjuster was changed from the usual movable plate to a coil with an adjustable slug. Also, in keeping with other manufacturers' designs, the register and nameplate were redesigned to present a more solid front. While the self-contained 3-wire version was replaced by the MX in 1994, the K-base and transformer-rated versions of the MS did continue in production for a few more years.   MS
Photo by David Dahle