EXCITER ROTOR P/N. M13641-4 USED FOR WELDING MACHINE LINCOLN TYPE MODEL/ SAE-400 SER.NO/ U1961107694 CODE NO/10137HP FOR TYPE PERKINS ENG. LIST.NO/LD70263 SER.NO/U748218B (YEAR OF MANUFACTURE 1996) OR TYPE MODEL/ K1278-5 SER.NO/ C 1040400086 CODE NO/10884 FOR TYPE AND TYPE PERKINS ENG. MODEL/3PKXL04.2AR1 ENG. NO/AS70456 (YEAR OF MANUFACTURE 2005)