i think its a model 99 (i just bought one for $35 at the swap meet, $40 to recondition it) its a 3/4 size the difference is that it doesn't have the shelf that lays down on the left side. like the other people said get the serial number and you can look it up on line and they will tell you the model, when it was made, the year, where it was made, how many were made etc.