One of the first and most important facts you should determine is the model number of your National cash register.
The model number generally is a 1 to 4 digit number on a brass tag on the very front of the machine - usually under the 'window' where the numbers 'pop-up'. Close to that should be the serial number - a five or more digit number generally in the 100,000's to 1,000,000 plus range, but often LESS than 1,000,000.
A serial number with an "S" in front indicates the register was reworked/resold by National. The original serial number is often found inside the machine somewhere.
Model and serial numbers can also be found on a paper label often still attached under the cash drawer. If present this is a noteworthy detail on determining the value of the machine. If the numbers on the front tag do not match the paper label it means the drawer and/or 'tag' have been replaced with parts from another machine. Often the model number can sometimes be found molded on the inside of the brass cabinet. National often stamped this number into the cast iron on the inside of the machine. If your machine has an S serial number on the brass tag you may be able to find the original number on the inside of your machine and that could help you find out the original shipping/manufacture date of your machine.
Remember - Model and Serial numbers are THE single most important information needed to find out more about your cash register and determine an approximate 'value'.
