Benjamin Ferris (1780-1867) and Thomas Parker (1761-1833) were both watchmakers in Philadelphia in the early nineteenth century. These are watch papers which were inserted in early timepieces and included identifying information about the watchmakers. Each paper lists the makers' Philadelphia addresses, includes a short inventory of his goods.

William Sellers & Co. was an iron works that manufactured machine tools used for turning, planing, shaping, drilling, boring, or cutting metal or wood. The company was founded in 1848 as Bancroft & Sellers by mechanical engineers and inventors Edward Bancroft (1811-1855) and William Sellers (1824-1905). The records consist of five volumes, as well as correspondence from William Sellers and the Sellers firm.