Sundials - World's Oldest Clocks

North American Sundial Society


Sundial: 156
State/Province:  Pennsylvania Country:  USA
Dial Type:  Horizontal Dial Condition:  
  Latitude and Longitude: 40° 1.922' N  75° 10.108' W
Location: Access: This is a private dial. See below for access details.
  • Grumblethorpe House
    5267 Germantown Ave.
  • A 1 foot diameter bronze horizontal dial in backyard garden. May be from 18th century. Gnomon is shaky for its bolts are loose. Style angle is about 51?, an angle for London, not for Philadelphia.
General Information:
  • Owner:
  • Designer:
  • Builder:

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