Lincoln Service Parts 1 › Lincoln Electric 9SM12390-42 TRANSFORMER ASBLY M12390-42 Lincoln Electric 9SM12390-42 TRANSFORMER ASBLY M12390-42 Sale Price: $474.26 Original Price: $545.40 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