Authentic Vintage SEIKO Double-Sided Triangular Ship Wall Clock — Original 1970s–1980s Slave Clock, Made in Japan

This vintage SEIKO ship clock is one of the rarest maritime timepieces you will ever find for sale. It is a genuine double-sided corner clock — a set of two clock faces combined in a single triangular unit — originally built in Japan and installed on large cargo ships and supertankers during the 1970s and 1980s. At 2 kg of solid steel with its original pale green paint, it is heavy, bold, and completely authentic. Nothing about this clock is reproduced or faked.

Whether you are decorating a home in London, a bar in Berlin, or a coastal restaurant in Marseille, this clock is an instant conversation piece. There is simply nothing else like it on a wall.

A Genuine Piece of Maritime History

This is an authentic antique SEIKO slave clock, salvaged directly from a working commercial vessel. SEIKO manufactured these triangular double-sided clocks specifically for use on large Japanese tankers and cargo ships from the 1970s through to the late 1980s. The triangular shape was not decorative — it was practical. The shape allowed these clocks to be bolted into the corners of passageways, cabins, and engine rooms, where sailors and crew could read the time clearly from two different directions at the same time.

Originally, each of these units was a “slave clock” — meaning it did not run independently. Instead, it was electrically connected to a single master clock in the captain’s cabin. When the ship crossed into a new time zone, the captain updated the master clock, and every slave clock on board changed automatically. It was a brilliant system of precision timekeeping across an entire vessel. Finding a complete, original double-unit in this condition is genuinely rare.

This example retains its original pale mint-green steel casing — the factory colour used on SEIKO maritime clocks of this era. At 2 kg, it is noticeably heavier than any decorative reproduction, and the solid steel construction reflects the demanding conditions it was built to survive at sea. Minor surface variations, small marks, and age-related patina are all part of what makes this piece genuinely antique rather than a showroom replica.

For more original maritime timekeeping pieces, explore our full collection of nautical clocks and barometers and vintage ship clock accessories.

Dimensions & Specifications

• Height: 30 cm
• Width: 22 cm
• Depth: 15 cm
• Weight of the set: 2 kg
• Material: solid metal frame with white clock face
• Design: 3-corner shape – two clocks combine for wall or ceiling mounting
• Brand: genuine vintage Seiko

The clocks run on standard batteries and keep accurate time. They arrive ready to mount with the original fittings.

Frequently Asked Questions

Q: How do you pack and send the vintage seiko corner clock set?

Yes, we wrap both clocks carefully in protective material and place them in a strong box. Every order to the UK and Europe is fully insured and tracked so they arrive safely at your door.

Q: Are these real old Seiko clocks or new copies?

They are 100 per cent authentic vintage Seiko clocks from the mid-1900s. We restored them carefully in Europe so they keep their original look and reliable timekeeping.

Q: How do the two clocks combine on the wall or ceiling?

The set is designed to fit together perfectly in a corner or side-by-side. They mount easily with the original fittings and create a striking double display that looks great in any room.

Q: Is the size good for a small space or boat?

It is just the right size for a hallway corner, yacht cabin or cosy room. The 3-corner shape makes the most of tight spaces while still making a lovely statement.

Q: Can I order one set for a gift or buy several?

Yes, we are happy to sort single gifts or bulk orders for yacht clubs, offices or special presents. Just send us a message and we will help with pricing and delivery.

Q: How do I keep the clocks looking nice?

A quick wipe with a soft cloth keeps the frames and faces clean. The paint finish is durable, and the clocks keep running reliably for years with a simple battery change.

Ready to add that special nautical touch to your wall? Take a look at our full range of nautical clocks and barometers or the bigger nautical ship wheels to build your perfect collection.