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Old 22 September 2009, 02:28 PM   #1
ehljason
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5513 back case no?

Hi everybody.

MAy i know that Rolex vintage watches back cover is suppose have writing :-

MONTRES ROLEX S.A.
GENEVA
SWITZERLAND
PATENTED
STAINLESS STEEL
5512

Question
1) the word read as PATENTED is must engraved on the back case?I find out have same model like 16750 some pc. have engraved and some pc. didnt have?Why?
2)My 5513 back case stamped as 5512 is correct?Why like that?
3) I have 2 pcs. 5513 and realise that one pc. rubber O'ring on the back cover(L' prefix).Another pc. rubber O'ring on the casing(9.5mil).is that have any reason?
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Old 22 September 2009, 07:23 PM   #2
eparisini
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IMHO many 5513 case back are stamped 5512
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Old 22 September 2009, 10:04 PM   #3
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Quote:
Originally Posted by eparisini View Post
IMHO many 5513 case back are stamped 5512
x2
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Old 22 September 2009, 11:31 PM   #4
mike
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Quote:
Originally Posted by eparisini View Post
IMHO many 5513 case back are stamped 5512
X3. It's well known Rolex used whatever was on hand at the time. They're the same piece. It's not uncommon to have a 13 with a 12 caseback and vice versa.

It's my understanding that in the states RUSA will use a 13 caseback on 1680s coming in for a new caseback as well as 1680 stamped casebacks are no longer in the system here.
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Old 23 September 2009, 01:07 AM   #5
Tools
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As to the O rings...

In the second case, the O ring is just stuck to the case-back... It could be taken off and reinstalled in the case before the case back is refitted..
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Old 23 September 2009, 04:17 PM   #6
ehljason
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thanks everybody.
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Old 24 September 2009, 12:17 AM   #7
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Err buddies...on Ref 5513 Sub...similarly with Ref 5512 / 1680 Sub...
usually the Gasket Seal is fitted on the Caseback cover...
as these cases are without groove for it...flat.

On Ref 16800 / 168000 Sub...or 1675 / 16750 / 16760 GMT...
or 16570 Exp II...or 1665 / 16660 SD for examples...
the Gasket Seal is fitted to the Case...
with groove...while the Caseback outer perimeter is flat...(without grove)

On Ref 16750 Caseback marking "Patented"...
The later ones would not have it...

The early 16750 caseback might have it...like the Ref 1675...

Orchi's response is also posted in the VRF...
Hopes the above helps...

http://www.network54.com/Forum/20759...f+again.%2B%2B
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