circa 1944, the signed circular silvered dial, 30mm diameter, with gold coloured Arabic numerals and hands, subsidiary seconds register at 6 o'clock and black chemin de fer chapter ring, signed 17 jewel mechanical crown wind chronometer rated movement calibre 30T2RG number 10432872, with later non liveried crown, case, 33mm diameter, verso snap on, plain and polished with personal engraving, interior signed and with Swiss markings for 18ct gold in addition to Poinçon de Maître, Key of Geneva number 4 for Antoine Gerlach SA, numbered 10726944, presented lacking the strap Footnote: Designed by René Bannwart, head of Omega's 'Creation' department from 1939 to 1952, the 30T2 was one of the most famous chronometer calibres ever made. It was first launched in 1939 and its outstanding performance made it the most precise wristwatch calibre ever tested at Neuchatel, Geneva and Kew, Teddington.