OK, hold with me here.
In 1963 the post offices created the zip codes.
61126 is the area code for Rockford, IL.
In Rockford there is a Boy Scouts of America team; Number 57.
Googleing BSA 8234 gives you a site about a silver dollar.
http://www.greatcollections.com/Coin...llar-NGC-MS-70
Googleing silver dollar and 15806 sends you to this site, about the red rainbow-fish. By the way the rainbow-fish picture was taken in IL.
http://www.ratemyfishtank.com/friendemail.php/15806
I couldn't find anything for the last number...