1969 carriers are coded with a J . What are 67 and 68 dated with. The castings are 30174. i noticed that 69 and 70 carriers have - 2 after casting number. I have a carrier with - 1 after casting number and stamped code of E 13 only. Thinking 1st version carrier and then - 2 was 2nd version. Any help. Thinking - 2 came into production at some time that guys know? Does anybody have a original 67 4 series carrier and 1968 4 series carrier that could look?