IVORY SECTOR RULE (ARCHITECTS RULER)
- Source: eBay
A fine Ivory sector circa 19th C. For the collector of scientific instruments.An ivory sector with a brass hinge and pins. This type of sector was used by architects. Undamaged and in very good condition. The over all length open is 12ins or 6.25ins closed. It is of good quality and has a nice feel to it. Thank you for viewing.