Original small clear glass lenses with a large flat trim ring. I believe these might be from heavy binoculars or an actual sight of some kind. Like the other lenses, I have given up on attempting to figure out exactly what they go to. These are new old stock from a warehouse with wear and dirt from age and storage. Price is for 20 lens.
Please only measure by the metric readout on the calipers, the standard side of this set is of a bit.
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