What do the symbols on the bottom mean? I have a set of three and on all of them there is what looks like a pair of old granny glasses. When looking at auctions for these, I am seeing that this means something. Some of the sets have other designs.
Thanks in advance for any help.

The mark on the bottom is the production mark, and tells you when the item was produced. Here is a website that has the Precious Moments production marks: http://www.atticshoppe.com/figurines...ts-marking.htm

The eyeglasses mean that it was produced in 1998

Some of the items might look the same, but come from different years production lines...so might be worth more/less. I have a nativity set that is from the original production (and worth quite a bit), but there are others that look just like it that are worth much less because of the different production mark. They were made after mine.