Historical primary sources
- Seiko Museum Ginza: The birth of the quartz timepiece ↗
- Seiko Museum Ginza: 1960s–1980s history ↗
- Seiko Museum Ginza: Mechanical engineering heritage ↗
- Smithsonian National Museum of American History: Seiko Quartz Wristwatch ↗
- Seiko Watch Corporation: Heritage ↗
Supplemental example observations
- Second Vintage: Lord Matic 5606-7070 reference guide ↗
- Catawiki: An illustrative individual 5606-7070 example ↗
Sales listings are cited as examples of individual physical objects and their descriptions, not manufacturer specifications.
Photography and illustrations
The watch drawings in this launch are new site-specific vector illustrations. They are labeled editorial illustration and are not intended to match the exact dial, case or dimensions of any historical reference.
The railway watch illustration shown below is an interpretive artwork supplied from Barrel & Coil’s existing image library, not a source photograph or independent confirmation of a railway award.
Historical-fiction artwork from the B&C creative archive. Treat all inscriptions and depicted documents as unverified.