I'm going to be honest, I have no idea what the reference could be, but it's fun!
Vintage 60s/70s Baby Yellow Raglan Sleeve Sweatshirt Tee. Flocked "50" on Front, Flocked Lettering on Back "Cleanhead"
Content Label Faded - Feels Like Cotton or Cotton/Poly Blend
Excellent Vintage Condition
Tag Size Faded
All Measurements Taken Flat
Pit to Pit-17"
Shoulder to Hem-22.5"