People over a "certain age" know what I am on sight, as do most "cool" younger people.
For those who don't know, I'm not just a "hip" t-shirt design, I actually serve a purpose. I'm the thing that adapts the big hole in a 7" 45 rpm record so they can be played on a normal spindle.
I say that my birthday is 3-31-1949 because that's when I became necessary with the roll-out of the 45. Let's not argue about that. Thanks!