DOUBLE ARM PROTRACTOR.ENGLISH MAKE,TROUGHTON & SIMMS For Sale

LACQUERED BRASS DOUBLE ARM PROTRACTOR BY TROUGHTON & SIMMS WITH 360 DEGREE SILVER SCALE. TWO SPRUNG FOLDING ARMS WITH POINTERS AND ETCHED CROSS HAIRS FOR POSITIONING BY THE CENTRAL GLASS. ADJUSTED BY THUMB WHEEL ANDGEAR MECHANISM TO THE OUTSIDE OF THE INSTRUMENT.DIA 6\" UNDAMAGED AND IN SUPERB CONDITION.CONTAINED IN ITS FITTED MACHINED SHAPED MAHOGANY CASE WITH ONE HOOK EACH SIDE ALSO NOT WARPED OR DAMAGED IN ANY WAY.