Accompanied by National Physical Laboratory Test Report confirming that the present deck watch, movement no. 360503, was submitted by Movado for the Class A Test at the National Physical Laboratory over the period 28 April 1931 to 14 June 1931 and that a Class A "especially good" Kew A Certificate was issued for it. It is furthermore delivered with the duplicata of the Neuchâtel Observatoire Astronomique et Chronométrique Bulletin de Marche confirming that the present chronometer has participated at the 1931 timing contests.
This watch is fitted with Movado's observatory calibre 355AN, developed in 1927 especially for the participation at timing contests. The movement has two remarkable features, the impressive size of a 65 mm. or 28''' diameter, and the finely finished escapement constructed in order to allow disassembling of all components separately. This construction facilitates precision adjustment and allows an easy exchange of individual parts.
It appears that a total of 48 examples of this calibre were made, out of which only six movements fitted with a spring chronometer escapement. The first series of 9 movements numbered 355001-355009 was produced in 1927, the second series, such as the present watch, comprising 39 movements numbered 360481-360519 as of 1929. Out of these 48 movements, 36 were tested at the Neuchâtel Observatory, 35 of which were awarded 1st prizes in the pocket chronometer category. Again out of these 35, a total of 18 subsequently also gained 1st prizes in the deck watch category. These impressive achievements clearly prove the undeniably high quality of this calibre.
The present watch numbered 360503 obtained a "Cass A especially good Kew A" Certificate on 16 June 1931 and a "Bulletin de Marche" from the Neuchâtel Observatory on 31 March 1931; it had been prepared and adjusted by Louis Augsburger.
For a detailed description and illustrations of these deck chronometers see The Movado History by Fritz von Osterhausen, pp. 91 - 100.