Lincoln Service Parts 1 › Lincoln Electric 9SM13940-1 CONTROL BOX SWITCH PANEL M13940-1 Lincoln Electric 9SM13940-1 CONTROL BOX SWITCH PANEL M13940-1 Sale Price: $74.47 Original Price: $85.64 CONTROL BOX SWITCH PANEL PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! CONTROL BOX SWITCH PANEL PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1