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Holland Circle
Catalogue number:
PH*317347
Inscriptions:
"JACOB SECOES" and "ANNO 1622"
Dimensions:
9.375 inches diameter
Discussion:
The outer circle of this instrument is graduated every 30 minutes, and has additional scales
for tangents, sines, and secants. The small compass in the center has a fleur-de-lis at north, and an
offset line probably indicating magnetic variation.
Further Information:
Holland Circle
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