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It's the design that is everywhere:
https://imgprxy.stacker.news/SEQdbMqMCXizMDpZMY_kkoha8qr6nWNLm0ln8Fj0GoI/rs:fit:600:500:0/g:no/aHR0cHM6Ly9pLmltZ3VyLmNvbS91MzlMZlJVLmpwZw
The AOCS APPROVED MJB 2013 version of it.
It's not exactly the same in the shirt, but it's basically the same idea.
It's the design that is everywhere:
https://imgprxy.stacker.news/SEQdbMqMCXizMDpZMY_kkoha8qr6nWNLm0ln8Fj0GoI/rs:fit:600:500:0/g:no/aHR0cHM6Ly9pLmltZ3VyLmNvbS91MzlMZlJVLmpwZw
The AOCS APPROVED MJB 2013 version of it.
It's not exactly the same in the shirt, but it's basically the same idea.