Zunow used (maybe still uses) a hummingbird hovering over a flower (often filled yellow and white), and a tiny starfish (usually filled in white or yellow). The starfish can be found on the sides of the BB shell/chain stay transition. The hummingbird shows up on the underside of the BB shell, seat stay caps and sometimes on the fork crown and B-stay shoulders. I have some with a couple of other cut-outs I can't really describe. One of them looks sorta like a leaf.
Pics on request (though I'm headed out of town early tomorrow for a week's worth of recreational riding around Solano Beach, so no urgent requests, please).
Dave "Zunow-phile" Ross
Portola Valley, CA