Early William James Frodsham Red Lion Square precision pocket watch with duplex escapement and chronometer balance

A rare, early precision pocket watch
from one of the most famous English clock and chronometer maker
William James Frodsham
Red Lion Square
Nr. 120
with duplex escapement and chronometer balance
ca. 1810

Details to the watch
Dial
    enamel
    large Roman numerals
    outer five-minute divisions
    blued hands
    blued auxiliary seconds
    very good condition, slightly traces of use

Movement
    full plate movement
    keywind
    duplex escapement
    chain/fusee
    solid round movement pillars
    ruby set and gold-chatoned barrel
    two-arm chronometer balance with segment-shaped weights
    chatoned ruby endstone on balance
    screwed chatons
    signed: "Frodsham, Red Lion Square, Werk-Nr. 120"
    the movement is is fully functional

Case
    18k gold
    smooth
    protective cap
    diameter ca.51 mm without pendant
    total weight of the watch: ca. 131g
    very good condition, slightly traces of use
The watch is fully functional and is in accordance with the age in a very good total condition.