I checked the serial number and it is correct for a 1951 Centennial. Make sure the machine has the same number if you win the bid. The pics also show a bobbin case, make sure it's there too. They're about $35 to replace.
I'd plug it in and run the motor for a bit at top speed and see if it loses any power. Other than that the machine is a workhorse. It's very easy to do the maintenance yourself and will run for another 100 years as long as you keep it oiled and lubed. I paid $200 and it's in almost new condition. Good luck. I love mine.
Last edited by hoppyfrog; 07-14-2012 at 10:50 AM.
Reason: added info