this is a remarkably preserved, museum-quality piece of gemological history: a vintage **Gem Instruments "The Gem Refractometer"** kit, designed by GIA founder Robert M. Shipley Jr. This specific unit features the highly desirable "Patent Pending" diamond logo stamped directly into the industrial gray alloy housing, dating this set back to the late 1940s / early 1950s. It is an absolute must-have for vintage tool collectors, GIA historians, or bench gemologists who appreciate classic precision optics.* **Main Unit:** Excellent cosmetic and physical condition. The original industrial gray paint is exceptionally clean with minimal wear.* **Optics & Mechanicals:** The black swinging eyepiece arm glides smoothly across the internal scale, and the adjustable eyepiece focus ring turns freely. The high-index lead-glass hemicylinder prism is bright and clear.* **Original Liquid Bottle:** Includes the ultra-rare, original amber glass contact liquid bottle with its vintage paper label intact. *(Please note: The fluid is included strictly as a historical collectible for display purposes only; it is not recommended or warranted for active chemical testing).** **Storage Box:** Comes in the original textured storage box, which retains great structural integrity and clean vintage branding.**What is Included:**1. Vintage Gem Instruments "Patent Pending" Refractometer Unit
2. Original Amber Glass Fluid Bottle (Collectible Display Only)
3. Original Branded Storage BoxThis beautiful piece of gemological heritage is being sold as-is due to its vintage nature. It will be meticulously packed with professional bubble wrap and heavy padding to ensure the delicate glass components and fluid bottle arrive exactly as pictured.


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