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A simple watch of relatively large diameter (61mm), with a single hand and enamel dial, equipped with a special movement of great simplicity based on a large central barrel. Launched through a publicity brochure in 1797, it was sold on a subscription basis, with a down-payment of a quarter of the price when the order was placed. Called “Souscription” in the sales ledgers, these watches were reliable and affordable; they proved a great success, attracting a large new clientele. Some 700 were made, with a choice of either a gold or a silver case. A few were produced of small diameter (c. 40mm). Abraham-Louis Breguet used the caliber of this watch to make his first tact watches.