Notes: Improved glass indicator. No model number. Lower stator pinned in four places. Serial number printed on the face on right side of both stators and the slide. Formulas and diagrams on reverse side are different from other models. Also gauge mark below KEUFFEL & ESSER CO. is SS=337.6 M instead of 369.2 YDS. and below U.S. on right is YD/M rather than M/YD.
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