lorenzo1910 Posted November 14, 2018 Report Share Posted November 14, 2018 Hello all, I don't know anything about the stem thread size and the coupling with crowns so, please, be patient if my question looks silly... I'm going to replace the crown in a Milsub rep watch that has a DG2813 movement... I need a Submariner crown (7mm) that would fit the DG2813 stem (the crown on the watch is a sterile 7mm crown)... what if the crown is stated "for ETA 2824/2836"? Different stem thread? Different tube thread? To be clear : the watch is a Tiger Concept 5513V2 and I would like to install the 7mm crown from Raffles Dials... Thank you! Link to comment Share on other sites More sharing options...
HorFan Posted November 14, 2018 Report Share Posted November 14, 2018 The stem thread should be the same.The tube thread/ tube size may be completely different- you'll only know until you try it. You made need to buy a crown/tube set. Link to comment Share on other sites More sharing options...
alligoat Posted November 14, 2018 Report Share Posted November 14, 2018 Raffles has what appears to be a 7mm 703 copy crown and tube for $16.99. Hopefully the thread pitch on the Tiger concept is 3.0mm x .35 as is the Rafflesdials tube, but once again, you'll just have to buy it and try it. Link to comment Share on other sites More sharing options...
lorenzo1910 Posted November 15, 2018 Author Report Share Posted November 15, 2018 Is it an easy task replace the tube? Guess my watchsmith has the knowledge (and the tools)... BTW I think that the Submariner cases from Tiger are the same that can be found on most of the cheap reps... and there are high chances that those crowns are made for that kind of cases... we'll see... Thank you guys... I'll share the result for future reference... Link to comment Share on other sites More sharing options...
alligoat Posted November 15, 2018 Report Share Posted November 15, 2018 It's fairly easy to do. First you remove the existing tube from the case (maybe with a rat tail file). You need a 3.0mm x .35 tap to clean out the threads in the case. Then you need a tube wrench to install the new tube- it's a Rolex tool which cost $35 or so. Put a little bit of thread locker on the tube before you install it. All of the crowns typically take a .9mm stem which is probably what you have on the dg2813. Don't know what the watchmaker would charge- if he has the tools, maybe $50-75. It takes maybe 30 minutes at most. Link to comment Share on other sites More sharing options...
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