2 year old EB-MM Sterling SUB

Just got this and wondering if I can't figure when it was made. Seller says he bought about 2 years ago from the local Sam Ash. MII with serial #B032272. single active pick up with 3 controls in a somewhat dull burgundy finish. Pots have no number but the 500 and 250 K. Anyway how can I can figure out approximate made time?