Rulers made of Ivory were in use by the Indus Valley Civilization period prior to 1500 BC. Excavations at Lothal (2400 BC) have yielded one such ruler calibrated to about 1⁄16 in (1.6 mm).
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Recycled 6inch/150mm Flat Ruler
1102710B£0.49 As low as: £0.20 -
Recycled 12inch/300mm Flat Ruler
1102710A£0.55 As low as: £0.30 -
Bianco Desk Ruler
1102708£3.40 As low as: £2.90
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