Edo purple runs through Seiko’s 145th-anniversary collection.

For its 145th anniversary, Seiko has used Edo purple, a colour linked to Tokyo's historical identity, to connect six different watch designs. The group spans Prospex, Astron, Presage, Seiko 5 Sports and a digital Rotocall-inspired model. Gold-coloured accents recur across the collection, though the watches use different movements and case constructions.

The pictured HBC006 Prospex Alpinist has a 39.5 mm steel case and an automatic 6R55 movement with a quoted 72-hour reserve. Its inner compass ring and purple-stitched leather strap give the anniversary colour a tool-watch setting. Seiko announced the collection in August for October availability; this report covers the launch as a single collection rather than six unrelated stories.