Egyptian wooden-pin locks, Chinese padlocks, American time locks, etc., are all displayed in lighted glass cases on the second floor of the General Society. Alongside the cases are studded trunks, with cleverly concealed keyholes, once used by bankers. Many of the examples are unique, made-to-order locks that were not produced in commercial quantities and nearly every lock has protected millions in money and securities.
To augment the lock collection. Mr. Mossman donated his notes and scrapbooks, known as the "Mossman Papers", which have proven to be a valuable resource for the study of locks. The Lure of the Lock was published in 1928 and describes each lock in the collection. This publication, as well as a photo CD of the collection, are available from the Society.
Collections of various antebellum curios, rare books, prints, flags, clocks and medals have also been donated by friends and members. Admission is $10 for viewing this museum collection, which is open to the public.
Hopkins, Albert Allis, (1869–1939). The Lure of the Lock; a short treatise on locks to elucidate the John M. Mossman collection of locks in the museum of the General Society of Mechanics and Tradesmen in the city of New York, including some of the "Mossman Papers". With 500 illustrations. New York, General Society of Mechanics and Tradesmen (1928).