Some help with a year

I picked up this datejust for my wife yesterday and was wondering what year it may come from. I won’t be able to get it in front of my jeweler for a few days.

It is stamped “L4 62523D 18 “ on the bracelet and “491b”

Most the models I see with this marking have a date and this is a no date.

Best guesses or range will keep me entertained for now.

Thanks