Lincoln Service Parts 1 › Lincoln Electric 9SM23774-2 EPOS4 50/5 WITH MOTHER BOARD M23774-2 Lincoln Electric 9SM23774-2 EPOS4 50/5 WITH MOTHER BOARD M23774-2 Sale Price: $1,746.81 Original Price: $2,008.83 EPOS4 50/5 WITH MOTHER BOARD PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! EPOS4 50/5 WITH MOTHER BOARD PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1