Edward Howard & Co., Boston, Movement No. 209, Case No. 209, 51 mm, 103 g, circa 1870

A gentleman's very fine, extremely rare American pocket watch - lever chronometer - so called "Blue Sapphire", with large blue sapphire jewels - only 500 pieces of the famous "Blue Sapphire" were created, this watch bears the no. 209
Cas e: 18k gold, polished, à goutte, numbered and signed gold dome . Dia l: enamel, Arabic numerals, auxiliary seconds, blued spade hands . Movm .: bridge movement, frosted, gilt, signed, wolfteeth winding wheels, "Patent D'05'10", blue sapphire endstones on balance, lever and escape wheel, blue sapphire jewels, bimetallic chronometer balance with gold and platinum screws and 2 star-shaped regulation weights, blued helical freesprung balance spring with terminal inner curve.

Most striking about this pocket watch are the large blue sapphire jewels - which are the reason why some collectors call the watch the "Blue Sapphire". This is regarded to be the best pocket watch caliber ever produced in the United States.