rs12 - English Balance Scale
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rs12 - English Balance Scale |
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| Roberval design, equal arm. Rounded, silver gray, cast metal base, 8 7/8" wide, with built-in receptacle at end holding five nested brass weights. Brass pillar and plates. Slots inside base for inserting scale and locking it is place. Elliptical indentation on face of base holds card with printed postal rates. Marked "Airweigh". |