Finding Aids

Betts & Seal was an iron foundry in Wilmington, Delaware that operated under that name from 1857 to 1867, but was established in 1828. The Betts family of Wilmington, Delaware, produced three generations of innovative founders and machinists. The records of Betts & Seal cover the operation of the foundry from 1828 to 1867. The result is a rare time-capsule look at the workings of a small but innovative foundry during the first phase of American industrialization.

John Zimmermann & Sons, Inc. was a manufacturer of upholstery fabrics in Philadelphia, Pennsylvania, for more than fifty years. This collection consists primarily of financial records from the company's founding through its sale to Merion Securities, Inc. It contains rich payroll and pension data of potential interest to labor historians. The collection also contains records from Zimmermann Mills, Inc. and J-Z, Inc., a division of Merion Securities. These materials are also primarily financial in nature.