Just got my Thomas Preik caseback from http://www.customwatchconcepts.com/

Have to say the spacer ring fit perfectly, the caseback was perfect, and the matte finish looks spot on against the Speedmaster mid case.

Had a bit of trouble with the dust cap, accidentially trying to jimmy the entire movement and dial out of the case before realising the dust cap was only the small part on top of the movement.

 

I'll see what I can do

I have to say though, whether Cal 321, 861, or 1861, the Speedmaster Pro movement is truly beautiful. What you miss in the pictures is that all the different bridges are polished and reflective, and as you vary the angle, different parts glint at different points, the level of finishing even after 45 years on this movement is truly sublime.

 

Beryllium copper alloy appparently

 

Indeed! Certainly seems to work too, mine is not only free of any spec of corrosion but the bridges have a near mirror finish to them

 

No, the plates never contained any gold, pink or otherwise.

Here is an article that proves the point:

http://members.iinet.net.au/~fotoplot/rgold/rgold.html

However, there have been gold balance wheels on some Omegas in the past.

Hope this helps,
gatorcpa

 

No like Gator says. The rumor gets perpetuated buy sellers on eBay and elsewhere that state it is a rose gold plated finish,

 

More photos of the Cal 321 movement through its sapphire caseback

 

Just had another delivery from Thomas Preik, this time a sapphire displayback for my brother's black stainless steel Daytona 116520, this is the model that is the exact same type, style, and height as the OEM Rolex caseback, and the level of finishing is brilliant:

 

Still have to wait another 6 weeks or so for RSC to finish fixing up the Daytona, its the same black dial that presently looks trashed in the photos in the other thread

Might get another one for his wife's white dial too

 

You can get me one too, if you want.
I mean, I'm jus saying