Lot 31 of 459:
Two rare works on watchmaking  

Click image to enlarge
Lot closed - unsold
$1,500 - $2,000

De la Mesure du Temps, ou Supplement au Traite des Horloges Marines, et a l'Essai sur l'Horologie [bound with] Eclaircissemens sur l'Invention, la Theorie, la Construction, et les Epreubes des Nouvelles Machines Proposees en France, pour la Determination des Longitudes en Mer par la Mesure du Temps.

Berthoud, Ferdinand


J.G. Merigot, & Didot Fils / J.B.G. Musier

1787 / 1773


Two volumes bound in one. [4], xiv, [2], 275, [1 blank]; viii, 164 pp. 11 engraved folding plates at the rear of the first work. (4to) 25x19 cm (9¾x7¾") later full mottled calf, spine gilt, all edges red. First Editions.

A pair of rare works by the great French scientist and watchmaker. Berthoud held the position of Horologist-Mechanic by appointment to the King and the Navy, and left behind him an exceptionally broad body of work, in particular in the field of marine chronometers. The first work is a treatise detailing all the parts required for the building of a sea clock. It helped to seal the reputation of Berthoud’s skill, in particular with respect to his competitors in longitude at sea research, such as Harrison and Pierre Le Roy. The second work is a response to an earlier treatise by Le Roy, evidence of their intense commercial rivalry.

Lot Amendments

Minor wear to binding; early owner's names on title pages, light foxing; near fine.

Item number:
Shipping info:

We have a full service shipping department to ensure proper packing and safe delivery of purchases at reasonable cost. We are specialists at packing and shipping books and works on paper.   All lots purchased by the same client are combined for shipping in order to keep the cost as economical as possible.  Our preferred method for domestic shipments is UPS Ground but we can also ship via FedEx or USPS Priority Mail. We do NOT ship USPS Media Mail under any circumstances.For international orders we select the most appropriate carrier depending on the value and weight of the items purchased.  We are happy to accommodate special arrangements by request.

Invoices are sent out the day following the auction and include a minimum $10 handling fee plus actual shipping and insurance charges.

Shipping estimates can be obtained  by contacting [email protected] prior to the auction.


Terms and conditions


All accepted bids are contracts and are considered final and non withdrawable.


A buyer's premium of 20% will be applied to all purchases.


The person posting the bids online has to be the person who has registered for the auction.