Manufactured: 1897 to 1958 Length: 10 inches Blade Width: 1-3/4 inches Construction: Cast iron Finish: Japanned Features: Compact one-handed use Uses: Adjustable steel sole cuts a concave or convex surface Average Dealer Price: $75 to $250 Average eBay Price: $70 to $220 Type 1: $200...Continue Reading... Stanley No. 20 Circular Plane