I am new to the forum and welcome members insight : the omega Seamaster 166.090 uses caliber 1002. The Ploprof 600 utilizes caliber 1002. Are these identical or is the 1002 modified in some way for use in the ploprof?

Many thanks.

 

Same movement.

Although legendary now the Ploprof was just another "tool" watch and did not command a special movement, the 1002 was Omegas bread and butter automatic at the time.

 

Thank you. One further question if I may, since the winding stem is positioned at 9 for the Ploprof, how does the calendar date wheel properly align with the window?

 

I think there is a special date wheel used if you are using a donor from another watch model.

http://www.ploprof.com/PloProf.html

 

Possibly, but not necessarily. One thing most collectors aren't really aware of is that there are different versions of the same movement out there, and it's related to things like the thickness of the dials, heights of markers, etc.

For example, the 1002 comes in at least 3 different "hand heights", so H0 is the shortest with a 1.27 mm hour wheel, and the tallest I see is the H2 at 1.77 mm. Although 0.5 mm might not seem like a lot, it's huge in watchmaking. I can't tell you what height the Ploprof needs, but if for example it needs the H2, and the donor movement you use is the H0, you will have difficulties getting the hands to work on the watch.

Same is true for modern movements, so the Cal. 1120 for example in the very common 25318000 is a different height than in the 22545000. The Cal. 1128 in the black version of the SMP GMT is very different than inside the Great White. This is why making a black version into a Great White, and doing is properly, is not easy - believe me I have done it. There are other implications than just hands, such as stem height, etc.

Again this is something that many people aren't aware of, and they think that same caliber in 2 different watches will be the same because it has the same caliber number. In reality, calling it an 1120 is only a partial designation - an 1120 used in the 25318000 is actually a 6001120H0A15800, and in the 2254500 it's a 6001120H1N15800.

Some movements have 4 or 5 hand heights available for them. If you have one that is the wrong height, you will typically need to replace the second wheel, the cannon pinion, and the hour wheel at a minimum.

And specifically in the case of the Ploprof as has been pointed out it's a destro model, so unless you want it to look like this:



You need a specific date wheel that allows it to be turned:



Hope this helps.

Cheers, Al

 

AL,
Many thanks. You are a font of knowledge.
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