{"title":"Gauges","description":"","products":[{"product_id":"a-d-leveridge-gauge-high-setting-small-aperture-accessory-c-1965","title":"A.D. Leveridge Gauge: High Setting \u0026 Small Aperture Accessory (c.1965)","description":"\u003cp data-path-to-node=\"1\"\u003eThe A.D. Leveridge millimeter gauge, first introduced in 1926, revolutionized the diamond industry by providing a standardized method for estimating the weight of mounted gemstones. By 1965, the evolution of jewelry design—specifically the popularity of high-profile \"ballerina\" settings and intricate mountings with restricted access — necessitated a more versatile measuring solution. This \"New Accessory\" represents a critical mid-century expansion of the Leveridge system, specifically engineered to allow appraisers to reach stones that were previously inaccessible to standard gauge anvils, serving as a mechanical bridge between traditional lapidary tools and modern jewelry aesthetics.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003eTechnically, this supplemental kit features specialized attachments designed to overcome the physical challenges of high-set rings and mountings with minimal gallery openings. These attachments function as precision extensions for the gauge’s measuring probes, allowing the user to bypass high prongs or reach through small decorative apertures in the under-gallery of a mounting. By facilitating direct contact with the stone's actual dimensions, the accessory ensured that the depth and diameter could be measured with laboratory-grade accuracy, maintaining the integrity of the Leveridge Weight Estimator tables even within the most complex modern mountings.\u003c\/p\u003e\n\u003cp data-path-to-node=\"3\"\u003eThis specific individually-packaged unit is considered a rare gemological artifact due to its unique status during the 1965 transition year. While all Leveridge kits manufactured from 1965 onward included this attachment as a standard component, this particular packaging was sold as a standalone \"upgrade\" exclusively for owners of gauges made between the late 1940s and 1964. Because the window for individual retail sale was exceptionally brief before the accessory became a permanent fixture of the primary set, surviving examples of this standalone supplement provide a rare historical record of the industry's rapid technological adaptation.\u003c\/p\u003e","brand":"Gems.studio","offers":[{"title":"Default Title","offer_id":51862771761472,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/0397\/2672\/files\/LeveridgeAddOn3.avif?v=1776735873"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/0397\/2672\/collections\/LeveridgeAddOn3.jpg?v=1776736772","url":"https:\/\/gems.studio\/collections\/gauges.oembed","provider":"Gems.studio","version":"1.0","type":"link"}