The Marine Chronometer: Its History and Development by Rupert Gould G-shock the latter was entirely self-educated

the latter was entirely self-educated and had never served a days apprenticeship to any clockmaker

Nivaflex mainspring

The case is absolutely new old stock

The book is bi-lingual with each page having two texts: English to the left and German to the right

The Marine Chronometer: Its History and Development by Rupert Gould G-shock the latter was entirely self-educatedFirst published in 1923, The Marine Chronometer: Its History and Development is the long awaited edition of the definitive reference work on the marine chronometer contains additional photographs and many of Rupert Gould's later revisions and corrections. It deals comprehensively with the chronometers history and the earliest attempts to measure longitude while including exhaustive discussions and diagrams of the various mechanisms employed with