Inscription presentation dated The new coaxial escapement consists of three components: Search Need to replace a watch crystal? No I do not accept cookies policy and close dialog box. Others may require a dull wide blade to pry or pop the cover. Many pocket watch case backs screw off. They include, for example, cookies that enable you to log into secure areas of the Website. The coaxial was first offered in limited series in It has quite a few unusual characteristics. Seven assorted Watches ; an Omega Seamaster Cosmic, a Favre Leuba with date, an early Viceroy and a Pierce all working an Omega Seamaster quartz with day date, a Raymond Weil quartz and a silver open face pocket watch af. A small Omega logo is stamped on the inner surface of both "lids". As a result, information displayed on this site may have inaccuracies. The effect of the thickness and viscosity of lubricant on balance amplitude has been virtually eliminated, extending the planned service interval to around 10 years. I don't know if this is significant, or just a standard quality seal or something.