This collection features a variety of scientific magnifying instruments and components. A brass folding pocket magnifier or linen tester is stamped with the maker name J. CASARTELLI MANCHESTER, identifying it as the work of Joseph Casartelli. Two microscope objective lenses are present, both engraved with UTILITY 1/2 IN oil imm; one bears a stylized W monogram, identifying it as a product of W. Watson and Sons. The group includes three handheld magnifying glasses: one with a brass handle decorated with incised floral and foliate scrollwork, and two with turned silver-toned metal handles featuring ball finials. Other components include a set of three graduated lenses pivoting on a single brass axis and a small circular lens in a brass frame. The instruments are manufactured from brass and silver-toned metal.
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