Lincoln Service Parts 1 › Lincoln Electric 9SG5639 CASE BACK ASBLY G5639 Lincoln Electric 9SG5639 CASE BACK ASBLY G5639 Sale Price: $752.67 Original Price: $865.57 CASE BACK ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! CASE BACK ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1