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Circa 1915

HEZZANITH BELL PATTERN MKIII SEXTANT AND ARTIFICIAL HORIZON BY HEATH & CO.

Signed on the radius arm "Heath & Co., Ltd., Crayford, London". The sextant frame in a bell pattern design, constructed of blackened brass with an 8-inch radius arm over a brass radius with inset steel scale. The arm equipped with 10 degree arc second vernier, and according to the 1915 National Physical Laboratory certification is completely error free, needing no correction (to one arc-second) at any setting. The wide range of accessories includes two telescopes, sighting tube, auxiliary eyepiece, scale mounting, 'Patent greatest angle clamp,' two solar filters, adjusting tool, original case with patent locking mechanism for the sextant. Along with a separately cased 'Patent Hezzanith Artificial Horizon' with telescopic lens, internal floating needle and attachable oil lamp and original Heath & Co. instructions. Contained within the original boxes, the sextant box marked "Bell Pattern MKIII Sextant.
The box, Height: 5.75". Length: 10". Width: 10.75.

  • Provenance:
    Tesseract, Hastings on Hudson, N.Y., 1994
    The Kelton Collection of Marine Art & Artifacts.

    This unusual artificial horizon attachment is a very early development of a gravity type instrument, proceeding the buble sextant. The artificial horizon is indicated by a pointer floating in pure water. It is designed to permit the use of the sextant when the true horizon can not be seen due to fog, darkness, or intervention of land. Since this insturment was developed before the use of electrical illumination, an oil lamp is provided for use at night.

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The Marine Sale Session I
August 4, 2022 9:30 AM EDT
East Dennis, MA, US

Eldred's

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Bid Increments
From: To: Increments:
$0 $99 $10
$100 $499 $25
$500 $999 $50
$1,000 $2,999 $100
$3,000 $4,999 $250
$5,000 $9,999 $500
$10,000 $29,999 $1,000
$30,000 $49,999 $2,500
$50,000 $99,999 $5,000
$100,000 + $10,000