View Larger Image   Dahl Master Slide Interlocking Rule Interlox   Description: This is an interesting type of boxwood rule, featuring the sliding extensions, instead of the more common zig zag folding type rulers. The slides are linked by brass guides and spring clips that hold the rule opened, or release the rule with a slight finger pressure on the top of the clip. The one is marked "MASTER SLIDE RULE INTERLOX DAHL MFG. CO. N.Y.C. MADE IN U.S.A.". There is a patent mark also, "PAT'D 12/13/1910 PAT'D 7/29/1913". It also has inside, and outside measurement sides of graduation. The side marked "INSIDE" is confusing to me, as it starts at the left with a section graduated from 1-8" then the next section from the left is marked from 72" down to 9". I have no idea how to use that side. On the side marked "OUTSIDE" the graduations are from the left 0-72". This rule is in good working condition, all the brass locks hold well, a few sections have some minor warping on the wood sections, we note one hairline crack on one side of the wood from 1-1.5" are under the INTERLOX logo, it is solid as it has been repaired with glue, a few tiny edge dings noted. The graduation markings are quite good, a few minor stained areas, and a few areas where the markings are a bit lighter than most of the rule, but certainly useable. The brass hardware is all in great shape, no damage, light tarnishing. One of the benefits to this type of rule versus that folding zig zag rule, is this type will close from full opened to completely closed in just a few seconds, much faster than another one could close a zig zag rule. Overall, a nice collectible rule from the early 1900's era!     Contact:   Great Expectations Antiques Seller:   Dealer/Mall    View Seller's Policy Seller Accepts:   We accept VISA, MASTER CARD, AMERICAN EXPRESS, PAYPAL, CASH, US POST OFFICE POSTAL MONEY ORDERS ONLY (ALL OTHER MONEY ORDERS WILL BE RETURNED), AND PERSONAL CHECKS. To order please click on the easy to use shopping cart. **INTERNATIONAL CUSTOMERS**PAYMENT BY CREDIT CARD PREFERRED** WE ONLY ACCEPT INTERNATIONAL POST OFFICE POSTAL MONEY ORDERS - PURCHASED AT YOUR GOVERNMENT POST OFFICE - IN US DOLLARS - ALL OTHER MONEY ORDERS WILL BE RETURNED. **ALL INTERNATIONAL CUSTOMS FEES, DUTIES, TAXES, BROKERAGE FEES ARE TO BE PAID BY THE BUYER**     Price:   $35.00  USD   Convert Currency Quantity Available:   1 Est. Shipping:   $6.00 USD Ship Internationally:   Yes   (Quoted at time of purchase) Shipping Paid By:   Buyer     Reference #:   T24915 Condition:   Good+ Circa:   1920's-30's Maker:   DAHL MFG. CO. N.Y.C. Additional photos Demo version

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