Edward Duffield was a clock maker working in Philadelphia, Penn.
From the description of Brass dial bracket clock, 1760-1770. (Winterthur Library). WorldCat record id: 668258788From the description of Tall case brass dial clock, ca. 1750-1780. (Winterthur Library). WorldCat record id: 668258892From the description of Tall case brass dial clock, ca. 1760-1770. (Winterthur Library). WorldCat record id: 668258909From the description of Tall case brass dial clock, ca. 1765. (Winterthur Library). WorldCat record id: 668258897From the description of Tall case brass dial clock, ca. 1760-1780. (Winterthur Library). WorldCat record id: 668258894From the description of Tall case brass dial clock, ca. 1760-1780. (Winterthur Library). WorldCat record id: 668258888From the description of Tall case brass dial clock, ca. 1770. (Winterthur Library). WorldCat record id: 668258531From the description of Tall case brass dial clock, ca. 1760. (Winterthur Library). WorldCat record id: 668258923From the description of Tall case brass dial clock, ca. 1740-1780. (Winterthur Library). WorldCat record id: 668258926From the description of Tall case brass dial clock, ca. 1760. (Winterthur Library). WorldCat record id: 668258902From the description of Tall case brass dial clock, 1750-1775. (Winterthur Library). WorldCat record id: 668258899From the description of Tall case brass dial clock, 1765-1775. (Winterthur Library). WorldCat record id: 668258529From the description of Tall case brass dial clock, ca. 1750-1775. (Winterthur Library). WorldCat record id: 668258904From the description of Tall case brass dial clock, ca. 1760. (Winterthur Library). WorldCat record id: 668258921From the description of Tall case brass dial clock, ca. 1740-1750. (Winterthur Library). WorldCat record id: 668258890From the description of Tall case brass dial clock, ca. 1760-1775. (Winterthur Library). WorldCat record id: 668258896