https://www.zazzle.co.uk/ikf4084i_c_t_shirt-235922162936523884 In the 1970s I got a catalog from a T-shirt company named "Outer products" and this one was in it. I had to look it up in the OS/360 "Messages and Codes" manual. It's a real code, and it fits. I never did try to reproduce it, though. paul