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18 April 2008, 01:13 AM
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#1 |
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Member
Join Date: Dec 2007
Location: Phoenix
Posts: 739
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How good is/was the double crown lock?
I see lots of new Rolex models with the triple crown lock, but how good was the older twin crown lock? I have read that the triple can keep water out even with the stem un-screwed, what about the twin?
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18 April 2008, 01:18 AM
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#2 |
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TRF Moderator & 2024 SubLV41 Patron
Join Date: May 2007
Real Name: Larry
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The Twinlock is waterproof if left unscrewed too. Just not to the same amount of underwater pressure..
Here's a breakdown of the Twinlock:  You see, the "O" ring around the stem is always there to keep out water and dirt. The gasket in the crown acts like the seal on a jar when screwed down ( hence, twin locks), so either one will protect, but both together are best. Problems happen when the "O" ring gets old and stiff or cracks. Water can then get past the stem if the crown is loose.
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18 April 2008, 01:26 AM
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#3 |
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Member
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WOW, great info. Thank You!
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18 April 2008, 01:26 AM
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#4 |
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"TRF" Member
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Real Name: Jos
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Thanks Larry! Hmmm...coming to think of it, are there any Twinlock pieces left in production?
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Life isn't what it is...it's what it looks like |
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18 April 2008, 01:32 AM
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#5 | |
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TRF Moderator & 2024 SubLV41 Patron
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Real Name: Larry
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Quote:
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18 April 2008, 01:42 AM
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#6 | |
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Banned
Join Date: Dec 2007
Location: USA
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Quote:
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18 April 2008, 02:02 AM
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#7 |
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Member
Join Date: Apr 2008
Real Name: Arturo
Location: Somzée, Belgium
Watch: DD 1803 '66
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GMTs
GMTs (I & II) also have Twinlocks except GMT IIc that has Triplock
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18 April 2008, 02:18 AM
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#8 |
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"TRF" Member
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Real Name: Bo
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Good chart!
The Triplock designation is strange in a way since there are actually four seals including the O-ring.  (Pic by Larry).  (Pic from my Photobucket, source unknown). "Exploded" Triplock:  (Pic from my Photobucket, source unknown).
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With kind regards, Bo LocTite 221: The Taming Of The Screw... |
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18 April 2008, 03:30 AM
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#9 |
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TRF Moderator & 2024 SubLV41 Patron
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Real Name: Larry
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Here ya' go Spacey...
The Triplock with all the pertinent stuff... (Stem "O"-rings, tube "O"-ring, and Crown gasket; hence Triplock) 
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18 April 2008, 03:35 AM
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#10 |
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"TRF" Member
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Real Name: Bo
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Cool, Larry!
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With kind regards, Bo LocTite 221: The Taming Of The Screw... |
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18 April 2008, 06:36 AM
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#11 |
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"TRF" Member
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Never heard of any issues with either the Twin or Triple lock. Both do as intended.
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Why have what's new when you have what's best. f |
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2 May 2008, 03:41 AM
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#12 |
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"TRF" Member
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Real Name: Dave
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Great info and pics. Thanks guys.
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Dave. 
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