This particular bronze sundial is marked "Whitehurst and Son/Derby/1812" and is thought to have been made for George Benson Strutt (who was the younger brother of the cotton spinner William Strutt), for his home Bridge Hill House, in Belper. This has the precise location of 53° 1′ 49.08″ north, and 1° 29′ 26.88″ West of Greenwich, which is slightly different from those of Derby, at 52° 55′ 00″ north, a difference of 6′ 49″. The Longitude is almost same, and gives only a 2 second time difference.