ANTIQUE
GLOBES, SURVEYING and DRAWING INSTRUMENTS for sale
An
ANTIQUE (BOX, POCKET, SURVEY) SEXTANT.
This mid nineteenth
century English box sextant variously called a drum, surveyors or pocket
sextant, is engraved just above the arc by Troughton
& Simms, London. This sextant has a military origin as
testified by the name and company of the original owner “T.S.Glover,
Bengal Engineers”, engraved
on the lid. The box sextant is complete with much of its original lacquer and is
a genuine antique instrument, NOT a modern reproduction. There is nothing
missing. It has 2 swing-out filters
which are covered by a dust shield when closed, the
inlaid silver scales are clear and the scale magnifier works well. The
instrument has a sliding shutter to select between a
small pinhole, a large pinhole and a detachable telescope, which even has a
separate sun filter. The fine adjust screws work smoothly and even the original
key for adjusting the calibration is still in it's rightful place in the
instrument. The screw off lid screws onto the base to act as the handle when in
use. This instrument is in working
order, and the optics and the mirrors are all original as best as I can tell. A
first class box sextant by the best makers of the day and with a military
provenance. -on
hold
A
fine antique mining dial/theodolite in its original fitted
mahogany case, engraved on the silver compass dial
JOHN DAVIS & SON, (DERBY) Ltd, and with the
serial number 4342, in its original case.
The horizontal silver compass has a thumbscrew needle clamp, is scaled 0
– 360 degrees on the outside, has four 0 – 90 degree scales on the inside
and a pair of working bubble levels inset. The
instrument has a thumbwheel underneath with which to
turn the dial horizontally, a clamping screw to fix the horizontal position, a
fine position control and a silvered vernier on the
side of the compass box for accurate reading. The instrument is fitted with a vertical
dial (effectively making it a mining theodolite). It comes with its original
case, which has brass clips & hinges. The
instrument is in good condition with lots of original lacquer left and makes a
very impressive display as well as being a rare working antique instrument -
£395
A
transit theodolite
engraved on the baseplate COOK,
TROUGHTON & SIMMS Ltd. YORK, ENGLAND No. 37084, in its original
case. The telescope has rack & pinion focussing and a pair of hinged
filters. The exposed vertical circle has 2 verniers
with silvered scales, clamp with micrometer fine adjust and a bubble level.
The enclosed horizontal silvered scale has 2 silvered verniers
and a horizontal bubble level on the plate. All this is
mounted on a three screw levelling mount with fine
adjust and clamp. The instrument, which has all original finishes, is in good
working condition, although the cosmetic finish leaves something to be desired,
and comes in it's original transit case
which is made from mahogany and has brass catches and hinges.
- £295
A
vintage (BOX, POCKET, SURVEY) SEXTANT. This
English box sextant variously called a drum, surveyors
or pocket sextant, and is a genuine antique instrument, NOT a modern
reproduction. There is nothing missing. It
has 2 swing-out filters and a sliding internal sun filter for the pinhole sight.
The inlaid silver scales are clear and the scale magnifier, which locates into a
centre pin for storage, works well. This instrument is in working order, as best
as I can tell. The cover has a handle to the top and on the inside
is a Table of Tangents. The cover fits onto the underside of the instrument to
act as a handle. The cover is engraved with the
original owners mark, “R.P.”
and the serial number “014”
and the makers name “E.R.WATTS & SON,
LONDON”. The paintwork on the instrument is showing its age but
the lacquer and silver scales are in good condition. -
£195
An
antique surveying level, in it’s original case.
The instrument has a graduated bubble level along the
telescope and cross bubble level at the front. It has rack & pinion
focussing, extending ray shade and dust cover, and a magnifying glass to read
the scale on the compass. A dry card compass mounted
beneath the telescope has a thumbscrew needle clamp and is finely engraved in
degrees on a silver scale. The instrument comes on a 3 screw mount for staff or
tripod mounting with rotation clamp. It comes in the original mahogany case
which measures about 20 inches long overall, contains a “No.8a
LEVEL BOOK” and has brass hinges and catches and is complete, and in
good working order. - £165
The World's Minerals
(with 40 colored plates) by L.J.Spencer
- £15
last updated 15/01/2012