Dbltap22 Posted March 4, 2017 Report Share Posted March 4, 2017 I a man going to attempt to build a datejust 31mm. I have located a rep (see link). And some parts on "Chrono24". since nobody builds these... I want to know if anyone has in the past. 1 will a gen dial fit? 2 will any other parts fit? i saw a tutorial for a 36mm DJ and it showed cutting off the legs. Any and all help thanks in advance Quote Link to comment Share on other sites More sharing options...
Sogeha Posted March 4, 2017 Report Share Posted March 4, 2017 I'm not seeing any link. Quote Link to comment Share on other sites More sharing options...
Dbltap22 Posted March 4, 2017 Author Report Share Posted March 4, 2017 http://www.pf-818.com/watches/rolex/datejust/datejust-mid/stainless-steel/rdjms30064-ss-oyster-grey-roman-swiss-eta-2836-2.html?___SID=U Quote Link to comment Share on other sites More sharing options...
Sogeha Posted March 4, 2017 Report Share Posted March 4, 2017 Nice project. I would be surprised if some of our members haven't built these mid size models Quote Link to comment Share on other sites More sharing options...
automatico Posted March 5, 2017 Report Share Posted March 5, 2017 Imho it would probably be easier and less $$ to go with a ready made 31mm replica and not go to the expense of a genuine dial. Since there is no way to know if a genuine dial will work with an Eta 2836 (date offset, dial window/seat OD etc) the project may be doomed from the start because many replicas have oversize dials. Many times projects using genuine dials are a downhill run because they will not fit replica cases and cutting dial feet off makes the dial worth a lot less. Btw...genuine rolex 31mm watches use lady size watch movements and the watch in the link is said to have a 'swiss' eta 2836...a close fit as the case is 31mm and the movement is 26.0mm so that only leaves 2.5mm case thickness for case back/case tube threads etc. Quote Link to comment Share on other sites More sharing options...
Dbltap22 Posted March 5, 2017 Author Report Share Posted March 5, 2017 Nice. Thank you for the insight. Going to order it and measure things out. Will report back. Anyone ever having direct dealings with the 31mm. Chime in. ? Quote Link to comment Share on other sites More sharing options...
jmb Posted March 7, 2017 Report Share Posted March 7, 2017 I have built a couple of 31mm OPs, no date version. I did not enjoy it... 1 Quote Link to comment Share on other sites More sharing options...
Dbltap22 Posted March 7, 2017 Author Report Share Posted March 7, 2017 Jmb thank you for the reply. I was looking into a gen dial swap. Maybe a crystal and bezel. Im guessing this Isn't 1:1. What roadblocks am I facing? What issues did you encounter with the build? thanks in advance Quote Link to comment Share on other sites More sharing options...
jmb Posted March 7, 2017 Report Share Posted March 7, 2017 The OP was in a complete gen case so a custom movement spacer had to be made for a 2671 movement as the 2836 size was a hair too big. The spacer was a PITA and I think I had to use hands from two different Rolex spec hand-sets to get the proper sizes to fit the 2671. If you are just going for the size/look the easiest thing would be to use a mid-size rep Tudor case as it will accept a 2836... 1 Quote Link to comment Share on other sites More sharing options...
automatico Posted March 8, 2017 Report Share Posted March 8, 2017 "If you are just going for the size/look the easiest thing would be to use a mid-size rep Tudor case as it will accept a 2836..." +1 Quote Link to comment Share on other sites More sharing options...
jmb Posted March 9, 2017 Report Share Posted March 9, 2017 I might actually have one... Quote Link to comment Share on other sites More sharing options...
Dbltap22 Posted March 9, 2017 Author Report Share Posted March 9, 2017 (edited) Interested!?!?! Let me know. 9 hours ago, jmb said: I might actually have one... Let me know Edited March 9, 2017 by Dbltap22 Member reply Quote Link to comment Share on other sites More sharing options...
Italiansub Posted March 29, 2017 Report Share Posted March 29, 2017 I have built a 31mm oyster perp also. I have to say...it was actually easier than the 36 dj's ive assembled. Also...@jmb the Tudor cases I've used do not fit a gen dial...the dials tend to be too small, but the case overall is very nice. Maybe I have a different version? I started with a rep using a miyota movement and a crystal gasket cut down to fit as a movement spacer. The biggest challenge was getting the gen dial, which is considerably smaller than a rep dial, to fit onto the movement. I solved that issue with an extremely thin washer bought from amazon, glued to the back of the dial. This fits over the movement and right into place when the case is all buttoned up. The hands still fit, and I didn't find a need to increase the pinion height. Here is the watch:I posted a thread on rwi but they seem to be down ATM.Sent from my iPhone using TapatalkBtw...my case happened to fit a gen crystal gasket, crystal, and bezel. The bezel fit was tight, and there is more case showing around the edge than I prefer...it's not noticeable on the wrist...but you know how it goes...once we see it...it's always thereSent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
jmb Posted March 30, 2017 Report Share Posted March 30, 2017 Very nice job! It's nice to know that a gen Rolex dial is smaller than the Tudor. I have built a couple Tudor mid-size with gen Tudor dials and they fit the case perfectly. Your solution was slick! Quote Link to comment Share on other sites More sharing options...
Italiansub Posted March 30, 2017 Report Share Posted March 30, 2017 Very nice job! It's nice to know that a gen Rolex dial is smaller than the Tudor. I have built a couple Tudor mid-size with gen Tudor dials and they fit the case perfectly. Your solution was slick!Thanks bro...but incase you forgot...it was actually your solution that I stole! Only difference, was that I took the shortcut of finding a .001 washer. Being the machinist you are...you had told me to grind down a washer to that size! Guess this is the "city-boy" version...And...if you have any of those Tudor dials kicking around, let me know...I've got one of those empty cases just wanting to be built up. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
jmb Posted March 30, 2017 Report Share Posted March 30, 2017 I think I used all of them but I'll check. I've also got a couple of those cases left and one is a two-tone complete with bracelet I'll likely never use. I got a lotta stuff like that... Quote Link to comment Share on other sites More sharing options...
Dbltap22 Posted March 30, 2017 Author Report Share Posted March 30, 2017 (edited) On 3/28/2017 at 10:27 PM, Italiansub said: I have built a 31mm oyster perp also. I have to say...it was actually easier than the 36 dj's ive assembled. Also...@jmb the Tudor cases I've used do not fit a gen dial...the dials tend to be too small, but the case overall is very nice. Maybe I have a different version? I started with a rep using a miyota movement and a crystal gasket cut down to fit as a movement spacer. The biggest challenge was getting the gen dial, which is considerably smaller than a rep dial, to fit onto the movement. I solved that issue with an extremely thin washer bought from amazon, glued to the back of the dial. This fits over the movement and right into place when the case is all buttoned up. The hands still fit, and I didn't find a need to increase the pinion height. Here is the watch: I posted a thread on rwi but they seem to be down ATM. Sent from my iPhone using Tapatalk Btw...my case happened to fit a gen crystal gasket, crystal, and bezel. The bezel fit was tight, and there is more case showing around the edge than I prefer...it's not noticeable on the wrist...but you know how it goes...once we see it...it's always there Sent from my iPhone using Tapatalk Noob question... The washer provides the necessary thickness to the dial for a proper fit. Were there issues with the washer coming in contact with the DW function? It seems these two would be in direct contact. I have ordered a V1 31mm datejust with Asian eta clone with DW from Lucy. Should be in route. Then an comes the search for a pink dial, crystal, gen eta movement Edited March 30, 2017 by Dbltap22 Accidentally tapped post Quote Link to comment Share on other sites More sharing options...
Italiansub Posted April 1, 2017 Report Share Posted April 1, 2017 That's a good questions. The washer has fitted to the movement side the movement spacer. This allows it to clear the DW same as it would with the dial. The trick here is to have a washer that's so thin it doesn't affect the stem or hand height significantly. I think if you look closely you'll see the movement spacer in the pic. Sent from my iPhone using TapatalkAlso...the watch I franken'd came with a DG2813 (similar to a miyota mvmt) so can't speak to the reps w eta/clones. Let me know how it goes. Also...gen crown fit mine.Sent from my iPhone using TapatalkOne more thing....since it's a no date dial...you could take off the DW if you were having clearance issues.Sent from my iPhone using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
jmb Posted April 1, 2017 Report Share Posted April 1, 2017 If you have clearance issues you can remove the DW as it's not needed on an OP. 1 Quote Link to comment Share on other sites More sharing options...
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