my muncie id # is P9P10. i know this translates to muncie 1969, sept. 10. my promblem is that all my books say after dec 1968 all muncies had the letter A,B, or C added to signify M20,M21, orM22. mine does not have that letter.does anyone out there with a69 or 70 have thier id # and does it have the A,B,or C at the end. THANKS