If you go back and get the serial number off that machine (or call and have the shopkeeper get it for you), you can look it up on the singer site and find out just exactly which model it is... and the year it was made. It's possibly an even better machine than the 221 (Featherweight). The bentwood cases are lovely. Here is where you can look up the serial number:
http://www.singerco.com/support/serial_numbers.html