While I would like to help you, my Clark ser.# directory shows that is most likely a Canadian lot # (1257), my book stops at lot #1225 and that is Mar. 1976. which sounds to me to be too new of a date for that series? Clippers were built in the 50's.sorry I can't be of more help. As far as getting parts, Clippers were pretty much "cookie cutter" as to many items alike, however many will be long since obsolete, depending on just what it is.? The "L" in the ser.# indicates it is a 1950 using the old Clark coding method. Bigais