According to my book, Allis-Charmers used the following serial # system from 1955-1970, an 8 digit #
1960- s/n 16,947,000
1961- s/n 18,787,000
1971 the system changed to a all digit#
1st digit 1= plant #
2nd and 3rd 71 digit= year 1971
4th/5th digit month 01 =january
6th/7th digit production # 279
WOW johnj, talk about "knowing what your talking about," thats an incredable discourse, hats off to you.
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