Antique Mahogany Cased U.S.L.S. Keuffel & Esser sextant.

Description

Antique Mahogany Cased U.S.L.S. Keuffel & Esser sextant..
This K&E model 5223B sextant’s serial number 17796 dates it to 1909. The U.S.L.S. mark stamped on the box probably stands for the United States Lake Survey, whose mission was to perform hydrographic surveys along the northern border between the U.S. and Canada, as well as several other inland waterways.
All of the lenses, mirrors, and adjustments on this beautiful old sextant are in good shape and work well. According to the attached adv. The gun metal sextant measures “angles up to 130 degrees. Radius 6 in., gradations on solid silver to 20minutes, vernier reading to 30 seconds...”.
The polished mahogany case, with brass fittings is solid and in great shape. It is specifically designed to hold the sextant steady and secure when the case is closed. The brass locking clamps hold the lid closed when carrying the box by its brass handle. There is a lock, but no key. There is a brass K & E plaque on the front of the box and a smaller ivory or plastic one on the inside.
This sextant and box are a great example of early 20
th
century scientific instruments manufactured in the United States.
Please email with questions.
Early Spectroscope Apparatus Machine 90+ Y/O Ad Trade Card
NOTE:
THESE ARE NOT POSTCARDS
THEY ARE TRADE/ADVERTISING CARDS.
THEY ARE MUCH SMALLER THAN A STANDARD POSTCARD
AND
THERE IS ADVERTISING TEXT ON THE BACK!
THE CARD DIMENSIONS ARE APPROXIMATELY
2 5/8 '' x 1 3/8 ''  or  6.5 cm. x 3.5 cm.
ORIGINAL 90+  YEAR OLD TRADE  ADVERTISING CARD
A SPECTROSCOPE
Spectroscopes are often used in astronomy and some branches of chemistry. Early
spectroscopes were simply prisms with graduations marking wavelengths of light.
NOTE:
THE REVERSE SIDE HAS TEXT ABOUT THE IMAGE ON THE FRONT SIDE
THE CARD DIMENSIONS ARE APPROXIMATELY
2 5/8 '' x 1 3/8 ''  or  6.5 cm. x 3.5 cm.
NOTE:
THE IMAGE ABOVE IS LARGER THAN THE CARD
TO SHOW THE DETAIL.
SEE SCALED IMAGE ABOVE.
THIS CARDS IS NOT A MODERN REPRODUCTION
THIS CARD IS 90+ YEARS OLD
IT IS NOT PERFECT AND THIS CARD MAY HAVE
SLIGHT PAPER LOSS
SMUDGING
ROUNDED CORNERS
SURFACE CREASE
SEE THE IMAGES ABOVE!
37
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BUY 1 TO 4 TRADE ADVERTISING CARDS AND THE TOTAL TO SHIP IS
BUY 5 TRADE ADVERTISING CARDS AND SHIPPING IS FREE
NOTE:
ON LARGER INTERNATIONAL ORDERS WE MAY REQUIRE REGISTERD
MAIL AND WILL SPLIT THE COST WITH THE BUYER.
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