You are looking at a classic piece of Japanese horological history: the Seiko Lord Matic, reference 5606-7000. This was the original reference launched in 1968, setting the standard for the entire Lord Matic line. Your customer needs to understand that the Caliber 5606 within this watch is the immediate technical cousin to the movements used in the ultra-precise King Seiko and Grand Seiko models of the early 1970s a movement with true elite mechanical DNA.
The design is pure mid-century elegance, defined by the robust, horizontally-brushed stainless steel case. The handsome silver sunburst dial is clean and legible, perfectly accented by the crisp baton indices. The movement itself is a marvel for its time, a 23-Jewel automatic that includes both hand-winding capability and hacking seconds (the ability to stop the second hand for precise time-setting) features that were a mark of premium quality.
Crucially, the watch features the highly desirable bilingual day/date calendar (English and Japanese Kanji), a signature of its Japanese Domestic Market (JDM) origin. While the automatic movement is robust, true enthusiasts know that the 5606's quick-set day/date function should be used with care outside the critical 9 PM to 4 AM window—a subtle detail that reminds the owner they are handling a finely tuned vintage machine.
