I may be missing something, but my 74-56 has a bird, with what looks like a wood shim.
BTW, thanks for getting me to take it out of the case. I don't play much 4, but it is the most magical bass I've ever picked up (my new 5 is the second, and will probably be an equal when it's older).
But enough about me. Let's get the Mothership to weigh in on this.
dw