Rolex OP 116000 Clasp Question

[SCutshall]

I am a Rolex Rookie (just purchased my first piece, an Oyster Perpetual) and while staring at it (endlessly) was curious as to the numbers and letters on the tongue(?) or tang (?) -don't actually know what that part of the clasp is actually called... the part that folds in nearest the inside of the Oysterclasp?
The numbers read either "Y1S" or perhaps it is "Y15" (I can't tell for sure because I don't own a loupe and my bifocals apparently aren't as strong as I thought they were).
Any ideas? I Googled it but I can't find anything. Is it a part number or code for the entire clasp or what?

Thank you for reading!

[SCutshall]

No one can help me?

[Stew7]

The 3 digits used to indicate a date code. It was a way to roughly verify your watch had the original period correct clasp and bracelet. I’m not sure if that is still true on new models but it’s a safe guess.

[SCutshall]

Originally Posted by Stew7

The 3 digits used to indicate a date code. It was a way to roughly verify your watch had the original period correct clasp and bracelet. I’m not sure if that is still true on new models but it’s a safe guess.

Thank you. 👍