GOOD TROUGHTON & SIMMS PILLAR FRAME QUINTANT IN USED CONDITION IN ORIGINAL KEYSTONE CASE ( THE CASE MARKED P.N. PROBABLY PROJECT NUMBER ) THE QUINTANT IS NUMBERED 3393 Ca.1850 & DATED WITH A GOVERNMENT
BROAD ARROW AND A DATE OF 1898 ON THE INDEX ARM, CONSISTS OF A LONG INVERTING SCOPE WITH 2 EYE-PIECES, A ERECTING SCOPE, SIGHTING TUBE, TWO FILTER CAPS & ADJUSTING KEY. THE SILVER SCALE -5 DEGREES TO 160 DEGREES IN 10 MINUTE DIVISIONS, READING TO 10 SECONDS OF ARC, READING TO 147 DEGREES ( QUINTANT MIN 144 DEGREES )