Hi,

During a meeting with a friend who owns several vintage Railmaster we wondered about the Railmaster crowns.

Did the crown is specific to this reference or is it the same with Speedmaster or Seamaster 300?

If someone who has information about that it would be very helpful

Thanks
T

 

The big logo crowns of the early models you mentioned look very similar.

But the stem sizes are different.

 

Yes they look similar but never had the opportunity to get the measurements of height and diameter.

 

The normal flat foot version is 6,1×3,1mm and similar naiad version 6,3×3,1mm.

 

Thanks for this infos Rail1957! And thanks Speedtar for the post. I was looking for the correct ref.
I also saw in an old post that’s the 6,75mm are correct, is that right? Or it’s only 6,1 and 6,3?