straight_six Posted January 31, 2010 Report Share Posted January 31, 2010 Just finished modding my new MBK DRSD, while at it, i discovered something strange...namely, there is a groove in the case around the base of the crystal...and not the one under the retaining ring! A wild guess would be that an o-ring strategically placed right there, before pressing the crystal/ret. ring would do wonders for water resistance. Any insights into this? I attached a pic that i shamelessly stole from one of ubi's threads. Chime in guys... Thanks, Dean Quote Link to comment Share on other sites More sharing options...
Pugwash Posted January 31, 2010 Report Share Posted January 31, 2010 Yes, an O-Ring goes there. Quote Link to comment Share on other sites More sharing options...
straight_six Posted January 31, 2010 Author Report Share Posted January 31, 2010 Yes, an O-Ring goes there. How sweet. I didn't put it. What size is it? Is it reasonably water resistant without it? Dean Quote Link to comment Share on other sites More sharing options...
Pugwash Posted January 31, 2010 Report Share Posted January 31, 2010 When I say an O-Ring goes there, I've never managed to fit one on. On the genuine Rolex, I believe there's an o-ring, but I've not seen one on a rep. I tried to fit one, but I couldn't fix the crystal on it. Quote Link to comment Share on other sites More sharing options...
alligoat Posted January 31, 2010 Report Share Posted January 31, 2010 It should be WR w/o it. Rolex didn't start putting an o-ring in the gens until the early 70's. I think that maybe the caseback gasket and this gasket are the same size. Ha, your pic is of a 1680 w/ the cyclops, but same idea w/ the 1665. You could also put some silicone on the gasket to help w/ WR. Quote Link to comment Share on other sites More sharing options...
straight_six Posted January 31, 2010 Author Report Share Posted January 31, 2010 It should be WR w/o it. Rolex didn't start putting an o-ring in the gens until the early 70's. I think that maybe the caseback gasket and this gasket are the same size. Ha, your pic is of a 1680 w/ the cyclops, but same idea w/ the 1665. You could also put some silicone on the gasket to help w/ WR. I think we're not talking the same o-ring. There is a place for one under the crystal lip, not under the retaining ring which is roughly the size of the caseback one. Quote Link to comment Share on other sites More sharing options...
straight_six Posted January 31, 2010 Author Report Share Posted January 31, 2010 When I say an O-Ring goes there, I've never managed to fit one on. On the genuine Rolex, I believe there's an o-ring, but I've not seen one on a rep. I tried to fit one, but I couldn't fix the crystal on it. Funny This is a new challenge for modders then...how to slide the crystal over this thing. Size anyone? Dean Quote Link to comment Share on other sites More sharing options...
Pugwash Posted January 31, 2010 Report Share Posted January 31, 2010 You can see the groove clearer on my exploded 1680 pic: Quote Link to comment Share on other sites More sharing options...
Justasgood Posted February 1, 2010 Report Share Posted February 1, 2010 I have a friend's Great White and it has the same groove. Pug, it is not the one under the Compression ring milled into the case body, this one is on the backside of the rehaut. I managed to search through my watchmaker's collection of O-rings and I got one to fit nicely. It needs to be the right circumfrence and very thin. Good luck, Kurt. Quote Link to comment Share on other sites More sharing options...
geyper man Posted February 1, 2010 Report Share Posted February 1, 2010 Fit a greased gasket like this one into that groove if you want a better water resistance: http://cgi.ebay.com/Crystal-Retainer-O-Ring-1665-1680-for-Rolex-Sub_W0QQitemZ230404162991QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item35a52885af This is my 5512, I'm sorry for the pic's quality: Quote Link to comment Share on other sites More sharing options...
Justasgood Posted February 1, 2010 Report Share Posted February 1, 2010 Not the groove we are talking about......I will get some shots of it shortly.... Quote Link to comment Share on other sites More sharing options...
Justasgood Posted February 1, 2010 Report Share Posted February 1, 2010 Here are pictures of the groove and the 2 O-Rings: The O-Ring in the Vertical area of the Rehaut backside is thin and very tight. I hope this helps. I am not aware of any Rolex Gens with this feature so to me it's a mystery. Quote Link to comment Share on other sites More sharing options...
jmb Posted February 1, 2010 Report Share Posted February 1, 2010 I think it's a pretty good idea for an O-ring to be here. Quote Link to comment Share on other sites More sharing options...
straight_six Posted February 1, 2010 Author Report Share Posted February 1, 2010 Kurt, that's the one! Could it be a rep feature only? I'm failing to understand how metal-plexi-metal combo is enough for 60+ bar of design pressure resistance...? Any chance to measure it? It would help a lot Thanks, Dean Quote Link to comment Share on other sites More sharing options...
Justasgood Posted February 1, 2010 Report Share Posted February 1, 2010 Kurt, that's the one! Could it be a rep feature only? I'm failing to understand how metal-plexi-metal combo is enough for 60+ bar of design pressure resistance...? Any chance to measure it? It would help a lot Thanks, Dean I'll stop in at my watchmaker and pick up a few O-Rings. Send me your address, Kurt. Quote Link to comment Share on other sites More sharing options...
straight_six Posted February 1, 2010 Author Report Share Posted February 1, 2010 I'll stop in at my watchmaker and pick up a few O-Rings. Send me your address, Kurt. U've got a conditional PM sir! Thanks! Dean Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.