Combination sundial and nocturnal celestial timepiece

Details Combination sundial and nocturnal celestial timepiece Combination sundial and nocturnal celestial timepiece

1977-02-22

1978-09-19

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

Sundial

D1003

Patent

active

D02494744

REFERENCES:
patent: 490185 (1893-01-01), Chamberland
Interiors 9/67 - p. 117 - Sundials at bottom-right.

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