How to find a case that fits a movement?

So, I have a Seagull ST16 day date movement I bought and ended up not needing, and since it's just sitting there in a box, I want to do something with it. I've looked around a little for a case, but I can't find anything that says specifically that it fits this movement. But there HAS to be something! What do you need to look at to know if it will or won't work in a specific case?

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Can find them on Aliexpress. Search for ST1612 and I believe Miyota 8215 cases work too.

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TyrogScot

Can find them on Aliexpress. Search for ST1612 and I believe Miyota 8215 cases work too.

So the ST16 with the dual calendar is the ST1612? I bought the movement on AliExpress, but it was just listed as ST16. And I know the Miyota 8215 is similar, but wasn't sure if they were the same. Especially since the watch I was going to put this in was too small for the ST16 I got to fit in. But I'll check for ST1612 cases and go from there, thanks!

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You can see all the variations with this link if you are interested.

https://reference.grail-watch.com/?s=st16

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TyrogScot

You can see all the variations with this link if you are interested.

https://reference.grail-watch.com/?s=st16

That is an awesome link, thank you! So I have the ST1642, date at 3 and day at 12. This link will come in EXTREMELY helpful!