Cyclops questions

[TARDIS]

Anyone here know (not guess) what the cyclops date magnifiers on Rolex are made of?

Sapphire Crystal?

Hardlex?

Some other type of glass?

Also:

Are they an integral part of the sapphire crystal over the dial? .......or,

Stuck on with a clear compound?


I have been asked these questions more than once. Latest was a discussion with a person who spotted my 16600 and asked why it didn't have a date magnifier (cyclops) like the Submariner. I was able to provide him the answer to this, but he them asked the abovementioned questions to which I couldn't give him affirmative answers.

Reason for this post is I hate giving assumptive information to people who inquire about Rolex. I am reasonably knowlegeable with the brand, but this question is asked from time to time and I have seen mixed answers.

Anyone help plse?

Steve