312

T-FRAME REFLECTING QUADRANT BY JOHN GILBERT II London, Mid-18th Century
Signed on the inset ivory plate on the cross-bar "J. Gilbert London", for John Gilbert II (Great Britain, fl. 1737-1791). Mahogany frame and radius arm (absent clamp). Inset boxwood scale reads 0-90 degrees and is divided by 4 seconds, and the diagonal scale is divided by tenths (.4 sec = 2.4 mi.). There are two sun filters and two horizon sight filters, moveable front to back. The front sight (upper) mirroring is worn, and the back sight (lower) mirroring has heavy craquelure. The foresight has two peep-sights (one large, one small) and the back sight has one peep-sight. Fitted with three turned ivory legs. Ivory pencil is missing from the holder at the top of the arced support frame. Box height 5". Length 20.5". Width 18".
Provenance:
West Sea Company, Old Town, San Diego, California.
Purchased from the above, 2012.


From the Kelton Collection of Marine Art & Artifacts.

Signed on the inset ivory plate on the cross-bar "J. Gilbert London", for John Gilbert II (Great Britain, fl. 1737-1791). Mahogany frame and radius arm (absent clamp). Inset boxwood scale reads 0-90 degrees and is divided by 4 seconds, and the diagonal scale is divided by tenths (.4 sec = 2.4 mi.). There are two sun filters and two horizon sight filters, moveable front to back. The front sight (upper) mirroring is worn, and the back sight (lower) mirroring has heavy craquelure. The foresight has two peep-sights (one large, one small) and the back sight has one peep-sight. Fitted with three turned ivory legs. Ivory pencil is missing from the holder at the top of the arced support frame. Box height 5". Length 20.5". Width 18".
Provenance:
West Sea Company, Old Town, San Diego, California.
Purchased from the above, 2012.


From the Kelton Collection of Marine Art & Artifacts.
Condition: Please contact Eldred's 48 hours prior to the auction start time with condition report requests. Please do not bid on any item without reading the condition report. The absence of a condition report does NOT imply that an an object is free of defects or restoration. Please contact Eldred's before bidding with any questions as to condition. Condition reports are provided as a complimentary service and only reflect the opinion of Eldred's and should not be taken as a statement of fact. Condition reports only detail flaws or restorations and do not take into account wear, fading, or other issues consistent with an object's age.

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August 13, 2020 10:00 AM EDT
East Dennis, MA, US

Eldred's

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$50 $199 $10
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