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Erster Skin Diver Squale Case: Crown Tube O-Ring Help

panchoskywalker
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I have this Erster skin diver that comes with a Squale case and I can't figure which O-ring might fit the tube & crown combination. I've tried this O-ring inside the tube as there is a small rehaut where it fits perfectly but pushing the crown inside is impossible without breaking the O-ring.

Movement is Felsa 4007N
O-ring is 2.8mm OD, 1.8 ID x 0.5 thick.

tube.webp crown2.webp 1.webp 2.webp
 
sah
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Bump this thread as I want to know as well. Maybe @Archer can comment
 
Archer
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Did it have an O-ring in the case tube before you tried adding one?
 
Archer
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panchoskywalker panchoskywalker
No it didn't.
So are you sure there’s supposed to be one there?

It’s possible the only seal is inside the crown.
 
panchoskywalker
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Archer Archer
So are you sure there’s supposed to be one there?

It’s possible the only seal is inside the crown.
I am not sure of anything, the watch was not working when I found it so I am trying to make it work correctly.

It might use only a o-ring inside the crown as you say. I'll try that.
 
panchoskywalker
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So I received a new movement (felsa 4007N) that came with a holder that I had to file down to adapt to this case and now the watch is working but as you can see there's a gap between the crown and the case.

Should I cut the stem?

I bought this watch in non working state and the crown came with the stem installed. Given the shape of the watch I presume it was kept in a drawer for years, so I wonder if I should cut the stem or if I did something wrong as both crown position are working fine now.

GG19Q5o.mp4
5.webp 66.webp 7.webp
Edited:
 
Archer
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If you are sure the stem is all the way in a properly seated, yes.
 
panchoskywalker
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Archer Archer
If you are sure the stem is all the way in a properly seated, yes.
If the answer is to cut the stem then what's the purpose of the spring inside the crown? A crown without the spring would be fine.
 
Archer
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panchoskywalker panchoskywalker
If the answer is to cut the stem then what's the purpose of the spring inside the crown? A crown without the spring would be fine.
Crowns don't normally have a spring unless they are screw down crowns, which I don't believe this is.

If you don't want to cut the stem, then don't.
 
panchoskywalker
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I ended up finding a tube & crown the same size of the original so I just swapped both. The original crown does screw a bit on the new tube so I think it is probably a screw down crown but the original tube has no thread anymore.

tube1.webp tube2.webp
 
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