Locksmith's guild sign, cast metal plaque – 30s, crossed keys, workshop sign with patina, 400g - antique

Authentic locksmith's guild plaque made of heavy cast metal (400g), produced between the 1930s and 1960s. The relief depicts the classic symbol of the locksmiths' and fittings guild: two crossed keys on a blue background. The surface has a beautiful, honest patina with age-related wear.

A distinctive object for collectors of craft and guild symbols, industrial history, workshop decoration, or as a striking vintage detail in interior design.

Material: Cast metal
Weight: approx. 400g
Period: approx. 1930–1960
Symbol: Locksmiths' guild sign (crossed keys)
Condition: authentic patina, commensurate with age
Context of discovery: North German workshop inventory


My shop offers several historical guild and craft plaques made of cast metal. The symbols shown come from various trades (locksmiths, blacksmiths, agriculture, mechanical engineering, state inspection marks, etc.) and can be purchased individually. Each plaque is an original workshop or guild mark from the period 1930–1960 with authentic patina.

Please note: Not every plaque in this series has foundry marks on the reverse. Some pieces were made in small workshops or regional guilds where markings were not standardized. Others show clear casting numbers or control stamps. Each plaque is an original craft or guild mark.