I have this cash register and I'm trying to find out about it. It's a National Cash Register made of wood and it has a serial number on it that reads S581943 and under that number is RA-1. At least that's what it looks like. I'm not sure of what any of this means but I would love to know. And if anyone can tell me and help me find its worth that would be great! I've posted it to the taggit site so if you see it and you know about it please contact me and let me know. Thanks.