The 10 Best things about Rolex

[M4tt]

The in-house movements (5035/5055) were built from 1977 onwards, there were 1,000 Beta 21’s made and they ended in 1972.

R

Sure, but in house in Bienne (Aegler) or Geneva?

[ralphy]

Sure, but in house in Bienne (Aegler) or Geneva?

I don’t know, Rolex certainly claim it as their own design.

R

[M4tt]

I don’t know, Rolex certainly claim it as their own design.

R

Absolutely, but they also claim all the other movements as their own designs too, even though the 12xx have clear roots in Aegler movements from when they still supplied Gruen. I'm not denying that the relationship between Aegler and Rolex was such that it's easy to forget that they were two companies, but until 2004 they were. You will not find the name Aegler on any Rolex movements from the thirties onwards.