Is this date real?

[Tush17]

I'm an owner of a 116618lb and a friend received this rolex date as a christmas gift that was apparently purchased 30 years ago. They asked me to help set the date and passed it over to me and it felt very light I had the feeling right away that it was fake but didn't want to insult anyone.

This is the only picture I have. I apologize if this is the wrong forum, could you please direct me to the correct one?

Thanks