Hey guys, I have myself two Model Ms and I'm trying to figure out which one to keep. I have a 1391401 and a 58G9658, both made in 93 (I like the blue label). The 1391401 is cosmetically in better condition as the plastic hasn't yellowed as much. Both have the 2-part keys but only the 1391401 has the detachable cable. I plan on bolt modding one and then selling the other. I'm asking mainly to make sure that there isn't anything else that sets one apart from the other. I'd hate to sell the superior one by mistake.