The purpose of THIS electronic guide is to support every Speedmaster owner in any situation, particularly when travelling. The MOONWATCH ONLY book is an exhaustive source of information about Speedmasters, however it is more than 560 pages long and weighs around 7 lbs. In this mobile guide, you won’t find all the details or historical information that we have gathered into the original book. Its focus is in a different direction: towards model identification, which is a key factor when searching for a Speedmaster. We have created a unique and user-friendly identification program, which allows you to identify any model from the standard production. Furthermore, you will be able to discover the whole production of Speedmasters, exhaustive summary tables, as well as the classification of all the standard components from 1957 to modern day.