12 size grade 419

Grade 419

Bridge model, nickel plates, pedant set, synthetic ruby and sapphire jewels, cupped and beveled extra highly polished visible winding wheels, one piece recoil spring click, micrometer nut ans screw regulator, gold jewel settings, gold balance screws, double roller escapement, steel escape wheel, exposed ruby and sapphire pallets, adjusted to temperature, isochronism and three positions, tested on half time without hair spring, very accurately rated, gilt lettering, handsomely finished throughout, all concealed parts highly finished, carefully timed and tested after being cased, shipped in elegant display box.

This is also Chesterfield grade, total production 1500.