Lincoln Service Parts 1 › Lincoln Electric 9SM12390-31 TRANSFORMER ASBLY M12390-31 Lincoln Electric 9SM12390-31 TRANSFORMER ASBLY M12390-31 Sale Price: $445.31 Original Price: $512.11 TRANSFORMER ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! TRANSFORMER ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1