Lincoln Service Parts 1 › Lincoln Electric 9SM21143-12 LEFT CASE SIDE ASBLY M21143-12 Lincoln Electric 9SM21143-12 LEFT CASE SIDE ASBLY M21143-12 Sale Price: $678.17 Original Price: $779.90 LEFT CASE SIDE ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! LEFT CASE SIDE ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1