Antique help...

I have an old buffet/hutch that was my step-dad's mothers, but I'm not sure if it's worth anything? I was going to put it on Craiglist, but Jason said to do some research on it before we possibly give away something worth a significant amount. So if you know anything about antiques' or know someone who I could call, I would greatly appreciate the advice. There is no label anywhere on the piece of furniture, so that could be a major stumbling block.
Here are the measurements and pictures of the piece:

Height of the buffet and hutch combined = 70"
Height of buffet alone = 31"
Height of hutch alone = 39"

Length of the buffet = 54 1/2"
Length of hutch = 50"

Width of the buffet alone = 18 1/2"
Width of the hutch alone = 12"

Side view


Hutch (on top)


Buffet (on bottom)


The whole piece


Numbers on the back of the hutch


Numbers on the back of the buffet


Any suggestions would be very helpful! Thanks!