Here is the previous pic [249999348] with the oddball signal, again, computer-converted to a red outline. On the left, the 164 is overlaid on top of the oddball. On the right, the oddball is overlaid on top of the 164.

Note the oddball is actually taller - and it also contains a lot more glass than a SDP 164. So although the dome numbers are the same - the oddball cannot be a uniformly-slumped a CD 164 either!