Intergenerational occupational mobility patterns measured from survey data collected in Indianapolis, Indiana in 1966 and 1968 were compared to patterns present in Rogoff's 1910 and 1940 marriage license data. The following moderate differences appeared between the 1966–68 and the earlier data: (1) the proportion of people moving out of their stratum of origin remained about the same, but among the movers upward mobility became more common and downward mobility less common; (2) the linear dependence of son's occupation on father's occupation increased, mainly due to a high level of dependence for men under 24 years of age in 1966–68; (3) the 1966–68 mobility process, compared to the 1940 process, tended to produce an upgrading within both manual and nonmanual categories.