Tuna Can Case – Complete


Create your own tuna can style watch from your old Seiko watch or new parts. This conversion case is great for giving your Seiko a new look or for building your own custom watch.

This case is made from stainless steel and complete with pretty much everything, all you will need a movement, dial, hands & a new stem for the crown. [The screw down crown is included]

There are 2 options for the bezel insert that is supplied with the case set – Etched or Lumed.

If it’s a bit to much for you, have WellingTime put your dream watch together for you!

2 in stock



This Tuna Can Case case is being sold as a complete case set. It has pretty much everything, all you need is the movement, dial, hands and stem. The Case comes with black ceramic bezel insert with a pearl of lume at noon.

Material & Finish

The tuna can case is made from high quality 316L stainless steel which has been milled from a solid block. The case has a brushed and mirror finish.

Supplied With

The Bezel, Ceramic Insert and Click Spring

Low Double Domed Sapphire Crystal

The Caseback

The Chapter Ring hour and minutes.

The Screw Down Crown

All Gaskets


Movements – this case is suitable for the following movements – (not included).
(7S35, 7S26, 7S36, 4R36, 4R35 6R15 – SSI NH36, NH35, NE15 etc).

Movement Spacer – The movement will  require a 3mm movement/dial spacer the kind that comes with the off the Shelf SSI (Seiko) movements (NH36 etc). not included.

The Dial – 28.5mm is the optimum size but it can work with dial 28mm-29mm not included.

Bezel insert & chapter ring – Suitable for modding for Aftermarket or genuine parts.


Case 46mm
Inc. Crown 47mm
Lugs 22mm
Thick: 14mm

Is this right for your mod?

If you have any questions or are not sure if this part is right for you please get in touch.

Free Postage on all items from the store! 

Free Postage to UK addresses. International is charged at set rates laid out during check out.

Additional information

Weight 0.25 kg
Dimensions 10 × 5 × 5 cm


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