From the late sixties, this is daring design from Omega. The diameter is 41mm, and the total height is 12mm. It has the solid steel bracelet, and the unusual feature that it requires a tailor-made strap or bracelet that fits under the securing ring on the back of the monocoque (“clamshell”) case. Omega “Tool 107” means that the watch is opened through the crystal. The blue dial is mint, with very nice white painted minute and second markings and white minute and hour hands. All lume is present and good. The white gold applied hour markings, logo and day/date window frame are also an exclusive touch. The case itself is nearly unmarked. The automatic day/date (Swedish days) movement has been fully serviced, and the watch comes with our 12 months watchmakers guaranty. Many Dynamics are found with straps, and therefore dependent on the difficult hunt for new old stock Dynamic straps. The (11) 1153/138 bracelet fitted on this watch is in very good condition, and of ample dimensions having 15 links (3 can be removed easily if your wrist is slender). The clasp is also adjustable to 8 different positions, so we think this is a watch for all sizes!