I did not encounter any problems thanks to the great tools Spiralwinder provided (for free). On there website it says if you need one of those just contact them. What I did was to add this request in the note section when placing the order, and they will include it with the case back. It’s 3D printed, solid but made of plastic. If you use it right it should not slip, but even if it does, it won’t scratch the case.
Finally got around to installing my Spiralwinder v2 on my 3570.50 this week. 😎
Aside from the obvious benefit of being able to view the movement, the reduction in overall case thickness was preferred.
Before & After
Good news to share as Spiralwinder emailed me back and confirmed that these casebacks do indeed have a safety margin so that even when tightened to the maximum, there is no risk of the movement contacting the sapphire.
I measured the total height of the FOIS with the replacement case back at 13.00mm. The official height is 14.5mm. This case back reduced it by 1.5mm or ~10%. That is indeed a significant change.
I think I’ll order another one for the 1957 60th speedy, that whole polished case back is so easy to get scratched.
I was wondering the same thing when I was fitting the new case back. It seems that what you feel in contact is the hermetic seal ring of the case back that sits on the outside part of the movement and helps keep it in place.
I think 1,5mm may be a little over measured, as shown on previous post, but the difference is very noticeable.
Well, to clarify, I did not "feel" the case back contacting anything solid when screwing it down, but merely judging from the look as the movement appears to be really close to the sapphire. When tightening the case back it feels just normal.
As to the thickness measurement of 13.0mm, here's the picture. I did not measure the original thickness and did not bother putting the original case back on to compare. The 14.5mm was based on searches online and may not be accurate. Some website listed it as 14.0mm. It'll be great if someone can measure it to confirm. Please note that the FOIS original case back is a bit thicker than a standard moon watch to accommodate the deep engraving.
Well, to clarify, I did not "feel" the case back contacting anything solid when screwing it down, but merely judging from the look as the movement appears to be really close to the sapphire. When tightening the case back it feels just normal.
As to the thickness measurement of 13.0mm, here's the picture. I did not measure the original thickness and did not bother putting the original case back on to compare. The 14.5mm was based on searches online and may not be accurate. Some website listed it as 14.0mm. It'll be great if someone can measure it to confirm. Please note that the FOIS original case back is a bit thicker than a standard moon watch to accommodate the deep engraving.
I've just realized that the other measurement shown was of a Professional.
So 1,5mm in FOIS case makes it even better compared.
Mine has been sent! (Spiral)
Looking forward to taking a pic and sharing here...
Thanks again for this address, they seem very very well manufactured👍👍
Quite disappointed for now... I'm still waiting for the parcel. The tracking indicated by Spiralwinder is an "empty" label. No parcel has been received by the transporter.
No answer to my mails, no answer to the online form... I'm beginning to having doubts about www.spiralwinderwatchparts.com/...
Quite disappointed for now... I'm still waiting for the parcel. The tracking indicated by Spiralwinder is an "empty" label. No parcel has been received by the transporter.
No answer to my mails, no answer to the online form... I'm beginning to having doubts about www.spiralwinderwatchparts.com/...
What country do they ship from? I was looking for that info but my google-fu is weak today it seems.
