Lot Essay
This chronometer was entered on the Royal Observatory Trial of 1874, when it was placed seventeenth. The Trial records describe its balance as Three compensation bars balance.
CHARLES FRODSHAM, NO. 3519, CIRCA 1850
Details
A Victorian mahogany Royal Observatory two-day marine chronometer with experimental Frodsham-Hartnup balance
Charles Frodsham, No. 3519, circa 1850
The silvered dial signed CHARLES FRODSHAM 84 STRAND, LONDON No. 3519 and with the Government Mark, Roman hour numerals, outer minutes chapter with Arabic numerals 60-5-10 et seque, subsidiary seconds dial (at VI) and up-and-down dial (at XII), blued steel hands, top-plate inscribed Charles Frodsham, LONDON and incised with the Government Mark, reversed fusee, Earnshaw escapement, unrecorded experimental Frodsham-Hartnup balance, bright polished steel helical balance spring, spring foot detent with jewelled locking stone, brass bowl and gimbal, three-tier mahogany brass-bound box, inset bone ivory disc to front of middle section inscribed C. FRODSHAM 3519 2 DAYS and with the Government Mark, external brass drop handles
100 mm. dial diam., 175 mm. sq. box
Charles Frodsham, No. 3519, circa 1850
The silvered dial signed CHARLES FRODSHAM 84 STRAND, LONDON No. 3519 and with the Government Mark, Roman hour numerals, outer minutes chapter with Arabic numerals 60-5-10 et seque, subsidiary seconds dial (at VI) and up-and-down dial (at XII), blued steel hands, top-plate inscribed Charles Frodsham, LONDON and incised with the Government Mark, reversed fusee, Earnshaw escapement, unrecorded experimental Frodsham-Hartnup balance, bright polished steel helical balance spring, spring foot detent with jewelled locking stone, brass bowl and gimbal, three-tier mahogany brass-bound box, inset bone ivory disc to front of middle section inscribed C. FRODSHAM 3519 2 DAYS and with the Government Mark, external brass drop handles
100 mm. dial diam., 175 mm. sq. box