I am fortunate to have a 1935 Twelve and a 1934 Eight, and it's interesting to me that the 1934 Eight has frame serial numbers and steering box serial numbers while the 1935 Twelve has neither. I've noticed this is true for other 1934 Eights and 1935 Twelves. I wonder, why did Packard do it that way? Curious if there was a reason they put it on one and not the other. Maybe they used serial numbers on higher production cars, or used them less often later? The reason may be lost to time, but it struck me as interesting.