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Donegan LP-5 Replacement Lens Plate for OptiVISOR, 2.25x Magnification, 8" Focal Length : Amazon.co.uk: Business, Industry & Science
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Donegan DA-S1 OptiVisor® Binocular Magnifier Set 6 Lenses, OptiLoupe, VisorLight 633096001684 | eBay
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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 DA-4 OptiVISOR Headband Magnifier, 2X Magnification Glass Lens Plate, 10" Focal Length : Amazon.co.uk: Stationery & Office Supplies
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