Lot 298 - [M] A 23½IN. RADIUS FIDUCIAL OCTANT, CIRCA 1750

Lot 299 - [M] A 14½IN. RADIUS VERNIER SEXTANT BY JESSE RAMSDEN, LONDON, CIRCA 1770

Lot 300 - [M] CARY PROTRACTOR DOUGLAS' REFLECTIVE

Lot 301 - [M] A 6½IN. RADIUS VERNIER SEXTANT BY WHYTE THOMSON & CO., GLASGOW, CIRCA 1900

Lot 302 - [M] A 6½IN. RADIUS VERNIER SEXTANT BY IMRAY & SON, LONDON, 20TH CENTURY

Lot 303 - [M] AN UNUSUAL ONE-DAY MARINE CHRONOMETER BY RICHARD C. WETENHALL, LONDON CIRCA 1820

Lot 304 - [M] Ø A SMALL ONE-DAY MARINE CHRONOMETER BY RICHARD WIDENHAM, LONDON, CIRCA 1825

Lot 305 - [M] A TWO-DAY MARINE CHRONOMETER BY JOHN POOLE, FENCHURCH STREET, LONDON, CIRCA 1890

Lot 306 - [M] A TWO-DAY MARINE CHRONOMETER BY ULYSSES NARDIN, SWITZERLAND, CIRCA 1923

Lot 307 - Ø [M] Ø A SEVEN-DAY MARINE CHRONOMETER BY MCLACHLAN, LONDON, CIRCA 1870

Lot 308 - [M] AN EIGHT-DAY MARINE CHRONOMETER BY LEVITT, LONDON, CIRCA 1825

Lot 309 - [M] A TWO-DAY MARINE CHRONOMETER BY PARKINSON & FRODSHAM, LONDON, CIRCA 1825

Lot 310 - [M] A RARE 'CIRCULAR TIME TABLE' BY THOMAS DUNN, CIRCA 1818

Lot 311 - [V] A PAIR OF 8IN. TABLE GLOBES PUBLISHED BY JOHANN DOPPELMAYR, NUREMBERG, 1730

Lot 312 - Ø [V] Ø A WILLIAM JONES 'NEW PORTABLE ORRERY', LONDON, CIRCA 1791

Lot 313 - [V] A FINE 2¾IN. POCKET GLOBE BY NATHANIEL HILL, CIRCA 1754

Lot 314 - [V] A 3IN. POCKET GLOBE AFTER HERMAN MOLL, CIRCA 1775

Lot 315 - [V] A RARE PLANISPHÈRE MOBILE BY GINOT DESROYS, PARIS, CIRCA 1847

Lot 316 - [M] A HUSUN STAR GLOBE BY HENRY HUGHES & SON LTD, LONDON, CIRCA 1920

Lot 317 - [M] A 19TH CENTURY DRY CARD COMPASS BY GRANT PRESTON, LONDON

Lot 318 - [M] A DRY CARD COMPASS BY SPENCER, BROWNING & RUST, WAPPING, LONDON, CIRCA 1820

Lot 319 - [M] A LATE 19TH/EARLY 20TH CENTURY PATTERN 20 PORTABLE BOAT COMPASS BY DENT

Lot 320 - [M] A 19TH CENTURY LIFEBOAT COMPASS BY DENT

Lot 321 - [M] A COPPER BOAT BINNACLE COMPASS BY D. MCGREGOR & CO., LIVERPOOL, CIRCA 1900

Lot 322 - [M] A 6½IN. DRY CARD COMPASS BY D. COHEN, NEWCASTLE, CIRCA 1840

Lot 323 - [M] A FINE AND LARGE PAIR OF DIVIDERS, CIRCA 1800

Lot 324 - [M] A 1½IN. POCKET MONOCULAR SPY GLASS BY JESSE RAMSDEN, LONDON, CIRCA 1800

Lot 325 - [M] A 19TH CENTURY 1½IN. SINGLE DRAW TELESCOPE BY T. HARRIS & SON, LONDON

Lot 326 - [M] A 1½IN. FOUR-DRAW TELESCOPE BY C. W. DIXEY, LONDON, CIRCA 1860

Lot 327 - [M] A 1IN. TWO-DRAW TELESCOPE BY W. & T. GILBERT, LONDON, CIRCA 1820

Lot 328 - [M] A ½IN. SINGLE DRAW MARINE TELESCOPE, CIRCA 1780

Lot 329 - [M] A SECTOR BY MATTHEW BERGE, LONDON, CIRCA 1810

Lot 330 - [M] A PAIR OF 15 x 80 JAPANESE BRIDGE BINOCULARS, CIRCA 1960

Lot 331 - [M] A CHEMICAL EQUIVALENT SLIDE RULE BY J. NEWMAN, LONDON, CIRCA 1830

Lot 332 - [M] A RARE BOXWOOD OPEN-FRAME SLIDE RULE BY JAMES NOBLE, CIRCA 1880

Lot 333 - [M] 19TH CENTURY MARINE SLIDE RULES

Lot 334 - [M] A BLADE PROTRACTOR, CIRCA 1847

Lot 335 - Ø [M] Ø A RARE SMITH-PATENT PANTOGRAPH, CIRCA 1850

Lot 336 - [M] AN ENGINEER'S MODEL FOR A TRAPEZIUM ENGINE, CIRCA 1890

Lot 337 - [M] AN ARTICULATED WOODEN MODEL FOR A MARINE TRIPLE EXPANSION ENGINE, PROBABLY 20TH CENTURY

Lot 338 - [M] A GOOD HYDROSTATIC SCALE BY W & S JONES, LONDON, CIRCA 1820

Lot 339 - [M] A RARE SILLOMETER / DISTANCE METER, 19TH CENTURY

Lot 340 - [M] A SET OF THOMSON SCIENTIFIC AND PHILOSOPHICAL MEDALS, CIRCA 1828

Lot 341 - [M] A 14IN WHIMSHURST MACHINE BY GRIFFIN, LONDON, CIRCA 1890

Lot 342 - [M] A BLUNDELL-DESIGN WOODEN DRAINAGE LEVEL BY HORNE & CO., LONDON, CIRCA 1850

Lot 343 - [M] A VICTORIAN COLLECTORS MARINE SPECIMEN CHEST

Lot 344 - [M] A RARE ELECTROMAGNETIC MACHINE BY BRETON FRÈRES, PARIS, CIRCA 1885

Lot 345 - [M] A RARE EXAMPLE OF GRIGG'S CONIC ELECTRO-MAGNETIC MACHINE, CIRCA 1875