look it up- you will be able to find it's *birthdate* as far as month & year- as for how old is vintage...i think generally between 50 & 100 years are considered vintage- more than 100 years you start getting into the antique catagories.
i have one alot like yours- it was very well taken care of- very clean- light working- good electrical- well used/loved/cared for machine- i picked up at a yard sale for $20- i felt very lucky/blessed to be able to bring it home- it has such a wonderful straight even stitch- is easy to maintain- i love that machine