Square Cover Glass Plate with Taped Edge in Paper Sleeve

A square cover glass plate for lantern slides, designed to protect and seal photographic slides used in projection equipment. The taped edge provides secure mounting, and the 2-inch format is standard for classic lantern slide sets. This piece reflects the optical and archival practices of early-to-mid 20th-century slide preservation, making it useful for collectors, historians, or anyone working with period projection equipment.

Condition: used good.

Housed in an aged glassine protective paper case; the glass appears intact with light handling wear, and the paper sleeve shows creasing and yellowing.