So now we understand why you can leave the sticker on the case-back (and also why there is no towel for when the watch comes out of the bath)!!

Jeff

++++++++++++++++++++++++

: Dear Jeff,

: First of all...my humble apologies for the amateuristic way of
: capturing my actions (also first time ever I used youtube as
: well). I could also have talked a little bit and give an
: explanation while I was doing the tests...but I'm a rather shy
: guy ;-)

: So, what we see in both videos are actually a 1133b Monaco and a
: 1163V Autavia being tested if they are waterproof or not. Most
: of you guys already know I can do some things with movements and
: cases...a part of that is also servicing crown and pushers,
: meaning a gentle polish and installing fresh sealings (as most
: of the times the original gaskets have become fluid or have
: become brittle...), a serious risk for water damage and
: certainly dust and dirt. Now with this device, the
: Greiner-Vibrograf Poseidon LT-100, watches can be tested without
: the use of water, so without the risk of damaging anything. The
: method used in this device is quite simple, but very very
: accurate. Watch is first tested in vacuum and then under
: pressure...

: Ofcourse...when a watch would not pass a test...one will still need
: to use the method which involves water, in order to locate the
: actual leak.

: Here will follow a short explanation of the steps involved during
: each test;

: General: The deformation of the watch is measured
: continuously during a
: tightness test through the high precision mechanics, the high
: resolution state-of-the-art electronics and the intelligent
: software.
: This is done with an accuracy of less than 0.0001 μm.

: Tightness test under vacuum: A vacuum is established in
: the chamber up to -0.7 bar. This means that the pressure in the
: sealed watch is greater than the ambient pressure. The watch
: expands outwards. This expansion
: (deformation) is measured continuously through the precise
: displacement sensor in the measuring head. The program, which is
: very extensive and is based on years of experience, will now decide
: independently;
: a) whether or not the watch was deformed sufficiently during the
: buildup
: of the vacuum.
: b) the time after which the measurement can be ended
: (only if the measurement time is programmed on automatic).
: c) whether the watch can be classified as tight or not tight.
: d) that the vacuum is checked continuously during the measurement
: operation.

: Tightness Test Under Pressure: Pressure can be established
: in the chamber up to + 10 bar. This means that the pressure in
: the sealed watch is less than the ambient pressure. The watch is
: pressed together. This deformation is
: now measured continuously through the precise displacement sensor
: in the measuring head. The program, which is very extensive and is
: based on years of experience, will now decide independently
: a) whether or not the watch was deformed sufficiently during the
: build up of the pressure.
: b) the time after which the measurement can be ended
: (only if the measurement time is programmed on automatic).
: c) whether or not the watch can be classified as tight or not
: tight.
: d) That the chamber pressure is checked continuously during the
: measurement operation.

: I was/am very pleased with the results which are visible in both
: videos...the 1163 Autavia passed the 10BAR Waterproof test
: flawlessly and the NOS 1133b McQueen Monaco did thesame with the
: 5BAR Waterproof test. It does not mean I would approve anybody
: to go swimming with them...at least I would never do...but
: ofcourse it is very comfortable to know. Then again...such a
: test is only a capture of a moment...

: I hope this was not too boring and was understandable...

: Thanks,
: abel.