Antique 19th Century Cow bone Folding Sector Rule Architect Engineer Drawing $69.37 USD Sold on: 2014-Oct-22 Marketplace: eBay 8 Treasure 0 Trash 100% Detail: An Antique 19th Century Cow bone Folding Sector Rule . Approximately 6" long . Graduated with various scales . Some slight staining through use to one side. No chips or cracks , pins in place. NO RESE... More Relevance Historical Items
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