![Serial Serial](/uploads/1/2/4/2/124276595/860378169.jpg)
Plate showing an NCR Serial Number The model # is generally a 1,2,3 or 4 digit number on a brass tag on the front of the machine. Close by should be the serial #; it is a 5 or more digit number generally in the 100,000ās or millions. A serial number with an āSā in front means the register was reworked and resold by NCR.
![National Cash Register Serial Number Location National Cash Register Serial Number Location](http://fontainesauction.com/wp-content/uploads/2013/09/music-auction-sept-23-2013-176_1.jpg)
The model number and serial number are usually located on a tag on the front of the machine. Before 1909, registers were either a one- or two-digit model number, for example, model 2, 50, 92.
The original serial number can often be found inside the machine if desired. See note below.
Model and serial #ās can also be found on the paper label under the drawer. If the number on the front of the machine do not match the label numbers it may mean the drawer has been replaced.