Anyone know how to figure out the expiration[1] date for photo paper?

There's a box of Kodak Polymax RC paper for sale, cheap, at one of my favorite
recycled-goods stores. It's apparently from a shop which went out of business,
and from the looks of the sticker seems to be maybe a decade or so old.

Annoyingly, there's no expiration date to be seen on the package! Film has it:
why wouldn't there be a date stamped there somewhere?

There are some numbers which *might* contain coded date information. I'd like
to know if this is worth bothering with or not. (The next question, of course,
is "how old can such paper be before it's no good?".)

And then there's the question of filtration; can I use my Ilford multicontrast
filters with this stuff?

[1] OK, "expiry" for you Brits.