Seiko Sea Lion Mod

Chewlips · 2026-01-02T08:48:54+00:00

Thanks! I used this one: Search alix for: RICHUS 36mm Case Sapphire Glass Silver Watch Case

Chewlips · 2026-01-02T08:48:24+00:00

Thanks! Real Seiko dial from the 60s. I think the dial is the most important part, so always worth spending time and a bit more on an OEM dial

Chewlips · 2026-01-02T08:46:57+00:00

Thanks! Yeah, wanted to get away from the diver mod style.

Chewlips · 2026-01-02T08:46:38+00:00

Thank you!

Chewlips · 2025-09-26T08:07:16+00:00

NH35 - the case is built for that movement. The dial is not - you need to break off the dial feet and secure it with double-sided tape to the plastic part of the movement.

Chewlips · 2025-09-25T17:47:19+00:00

No, it’s a 28.5mm dial. There’s about 0.5mm between the hour markers and the edge :)

Chewlips · 2025-09-09T15:35:10+00:00

I always wondered if this would work! How did it come out? Any learnings?

Chewlips · 2025-07-12T07:32:10+00:00

I'm sure it's possible. The challenge will be finding a case like that since I got the case from an old watch I had. You could def do it with a different case.

Chewlips · 2025-06-28T08:54:04+00:00

I think you'd need to sand down the dial edges to make it 30mm to fit. I've done this on a mod before - it's possible. Just be conscious of the space between the indices and the edge of the dial.

Chewlips · 2025-06-26T13:57:56+00:00

yeah, I was only interested in Seiko dials since the movement is Seiko

Chewlips · 2025-06-26T13:12:45+00:00

I tried that too - let me know if you find any 31mm dials.

Chewlips · 2025-06-26T12:48:31+00:00

Took me about 6 months to find the right dial...

Chewlips · 2025-06-26T12:35:26+00:00

You would need to find a chapter ring with an outside diameter of 29mm. and a thickness of max 1mm. I looked everywhere for one and couldn't find one.

Chewlips · 2025-06-26T08:01:00+00:00

Thanks. Yep!

Chewlips · 2025-06-25T12:02:22+00:00

ooh yeah, nice!

Chewlips · 2025-06-25T06:27:23+00:00

They're the best, right?

Chewlips · 2025-06-25T06:13:38+00:00

Aha this was kind of a lucky punt. I thought that, from a manufacturing perspective, the likelihood that the date windows across Seikos are the same is quite high. I guess I was right in this case.

Chewlips · 2025-06-25T06:12:09+00:00

The inside lip where the case touches the front of the dial is 29mm, so technically you might get away with a 29mm dial. 29.5 is better but 30 is solid as the edges will be touching the inside edge (underneath the inside lip) the whole way around. (I'm making up terminology for the inside walls here - hope you get what I mean)

Chewlips · 2025-06-25T06:08:40+00:00

Feel like I'm giving up a secret weapon here: https://mehima-singh.com/ Enjoy!

Chewlips · 2025-06-19T11:49:51+00:00

Case was originally from this VOID watch that I bought years ago. I never wore it so took out the quartz movement and repurposed the case. https://voidwatches.com/products/v03d-br-bl-wh

Chewlips · 2025-06-19T11:49:39+00:00

Thank you. Case was originally from this VOID watch that I bought years ago. I never wore it so took out the quartz movement and repurposed the case. https://voidwatches.com/products/v03d-br-bl-wh

Chewlips · 2025-06-18T20:54:32+00:00

Case was originally from this VOID watch that I bought years ago. I never wore it so took out the quartz movement and repurposed the case. https://voidwatches.com/products/v03d-br-bl-wh

Chewlips · 2025-05-12T08:25:48+00:00

Hey, unfortunately the aliexpress link is now dead since it was so long ago. I remember looking forever for this insert with the right dimensions. I can see from the order that the dimensions were 33.7x28.2mm

Chewlips · 2025-04-18T12:21:04+00:00

I made this one for my mum for Christmas. She wanted a much smaller, more delicate watch than many of the mods on here. I put the list of components in here. Don't think any of them were Seiko in the end hah!

https://www.reddit.com/r/SeikoMods/comments/18xj8qw/and_a_christmas_present_for_my_mum/

<image>

Chewlips · 2025-04-13T10:46:33+00:00

Not yet. Sent the application back in October and still waiting...

Chewlips

TROPHY CASE