This vintage membership card from the American Association of Master Locksmiths, Incorporated, documents the professional affiliation of Bussolar Thompson. The card, issued from the organization's headquarters at 530 West 125th Street in the Manhattanville neighborhood of New York City, bears the handwritten signature of Secretary Walter H. Howe and a period of validity with a notable typographical error, reading To JANUARY 20193 6, which was almost certainly intended to be a date in the 1930s. The cardstock exhibits characteristic age-toning and edge wear, with a prominent red institutional stamp partially overprinting both the member's name and the association's title, adding to its authentic, handled character. The item serves as a tangible artifact from the early professionalization of the locksmithing trade, reflecting an era when craft guilds and trade associations were formalizing standards and creating networks of certified practitioners. The typography and layout are representative of early 20th-century commercial printing, utilizing a straightforward, functional design to convey legitimacy and official status. This piece of occupational ephemera provides a direct link to the history of skilled trades in New York City, specifically within the borough of Manhattan, and illustrates the importance of credentialed membership in establishing trust and expertise within a security-focused profession. The card's survival offers a rare glimpse into the administrative artifacts that underpinned the daily operations of trade associations dedicated to upholding craftsmanship and ethical business practices during this formative period for American vocational organizations.