Seiko 5 Sports 42.5mm SRPJ45K

The Seiko 5 Sports Skeleton Style SRPJ45K pays tribute to Seiko’s rich design archives, drawing inspiration from the iconic 1970s “Time Sonar” while retaining the beloved SKX case shape known from the 1990s Seiko 5 Sports era.

This modern interpretation showcases the original Time Sonar’s standout features—a translucent dial revealing the rotating day/date discs and a striking red‑orange seconds hand—now refreshed with contemporary materials and engineering.

Built on more than fifty years of Seiko 5 Sports heritage, the SRPJ45K embodies the core principles that define the collection: automatic movement, day‑date functionality, water resistance, a recessed crown, and a durable case‑and‑bracelet construction. With its Hardlex crystal, 10‑bar water resistance, LumiBrite-enhanced visibility, and robust 4R36 automatic calibre offering a 41‑hour power reserve, this watch delivers the reliability and performance Seiko is celebrated for.

What we love about the SRPJ45K. The SRPJ45K perfectly blends retro charm with modern durability. The translucent blue dial is visually captivating, the SKX‑inspired shape feels instantly familiar on the wrist, and the nod to Seiko’s Time Sonar history makes this piece a standout for collectors and everyday wearers alike. It’s a bold, unique Seiko design—full of character, heritage, and unmistakable vintage appeal.

Orders are dispatched within 1–3 business days from Sydney via Australia Post Express for fast and reliable delivery. Customers located in Sydney may also enjoy the convenience of same‑day Click & Collect, with orders ready for pickup from our Alexandria showroom just one hour after purchase when this option is selected at checkout.

Every watch is covered by a 3‑year Seiko Australia warranty, providing complete peace of mind. StarBuy is an Authorised Seiko Distributor, and all watches are supplied in genuine Seiko original packaging. Warranties are registered online directly with Seiko, and following dispatch, Seiko will email you confirmation of your warranty registration along with a link to the online instruction manual. In line with Seiko’s current sustainability practices, printed warranty booklets and manuals are no longer supplied.