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Optiloupe' easily attaches to either side of the Optivisor providing additional 2.5x magnification - Preservation Equipment Ltd
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Donegan Optical OptiVISOR LX Binocular Lensplate #4 Magnifies 2X at 10-inch, Other, Multicoloured, 5.08 x 20.32 x 29.59 cm : Amazon.co.uk
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