That is a fine machine there!!! Spartan was Singers base model machine but it was built with all of the quality that you would expect from a Singer. Just look at it as an entry level machine.
I like how well it was taken care of and the finish is really lovely. It is a heavy little bugger but it is a work horse. They made a few of the 99 Singer in aluminum but the FW is still the lightest of the Singers other than the Model 24, 30 and the 20 (toy machine).
If you keep it oiled, polished and serviced (which you can do yourself) it will out last you and your kids!!!
Billy