• Rare early aerospace electronics collectible. Excellent for desktop décor, engineering art, museum collections, or gold scrap recovery. • Hand-soldered wire bonds (classic hybrid construction). ✔ Original gold-plated traces & wiring.
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eBay
Made in the United Kingdom, this tester is a unique piece of history that would be a prized addition to any collection. I will respond to you as soon as possible and do my best to help you out.
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Brass Kaleidoscope – Unique Optical Toy & Artistic Tool. Add a touch of nostalgia and creativity to your collection with this exquisite brass kaleidoscope! ✔Material: Brass.
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Old measuring tool in a canvas case look very old but good condition see photos 
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The cursor is missing, but similar BRL Janus series cursor with a single central hairline could be used. Using formulae developed by Hazen-Williams and J. Tarrant, this slide rule calculates hydraulic flow in pipes and circular sewers on one face and hydraulic flow in open channels on the reverse face.
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Comes with everything pictured See pictures for condition Free shipping to the lower 48 states only If you have any questions please let me know Thanks!
eBay
eBay