Thanks for all the replies. It's definately a 5 digit SN without a letter preceeding it. I hadn't looked at the bottom of the barrel before but it has the same 5 digit SN. With the left stock removed the number "94" is stamped on the front top of the frame. Also, the letter "P" with a circle around it is on the bottom back of the frame. Could the star preceeding the SN on the butt indicate that the factory placed a newer barrel on an older gun and late-shipped it?