Lincoln Service Parts 1 › Lincoln Electric 9SM23774-15 EPOS4 50/5 WITH MOTHER BOARD M23774-15 Lincoln Electric 9SM23774-15 EPOS4 50/5 WITH MOTHER BOARD M23774-15 Sale Price: $1,830.79 Original Price: $2,105.41 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