Logos on old mouse ears??

Anyone know if there is somewhere you can see the logo used on the mouse ears over the years? I have a set of mouse ears but I don't know if they were purchased on a trip when I was 3 or when I was 17. I don't know how to determine. I thought I had ears from both trips, but I can only find one set.

Thanks!

The only thing I can think of would be searching Google and make sure you look for images from the years you visited