$18 · Vintage Bausch and Lomb "Linen Tester" magnifier

model 81-31-49 N8869: The product is called a "Linen Tester" which is a strong magnifier with a measuring scale and a built-in stand. Historically they were, and still are, used to check the quality of woven fabrics (hence the name). They are also used for by extensive range of professions. Helpful for small detailed embroidery, art, or jewelry projects, etc. Power: 5x Lens diameter: 1" Focal distance: 2" Rigid plastic case used but in good condition. Note: the seller is in Metchosin; the item is available if the ad is posted