A classic reference from the cornerstone of Seiko's high-grade mechanical history. This Seiko Lord Matic, reference 5606-7010, is a genuine Japanese Domestic Market (JDM) model, which means it houses the highly engineered Caliber 5606 movement the 23-Jewel automatic engine that shares its architecture with the top-tier King Seiko and Grand Seiko models of the era!
The most eye-catching feature is the unique case design and the crystal. The angular, sculpted stainless steel case flows seamlessly to a wide bezel, but the real magic happens when light hits the faceted crystal. This multi-sided crystal (likely Hardlex or acrylic) was an audacious 1970s design choice that fractures and reflects light, creating a dynamic, shimmering effect that makes the watch come alive on the wrist.
Functionally, the 5606 is an enthusiast's dream: it includes both hand-winding and hacking seconds for precision time-setting. The Day/Date display is bilingual (English and Kanji), a key indicator of its JDM origin. While the quick-set date function is a known vulnerability on this caliber, a fully functional piece like this indicates a cherished and well-preserved mechanical marvel!
