It was not in the box. Back then, it was still quite difficult to get a hold on an actual R3 box here in Europe. There was 1 official reseller here in the Netherlands and I actually bought their official demo machine: the famous first dual processor Abit BP6 with 2x 400Mhz Celeron processors. When picking it up in their office I spotted the poster and asked if I may have it. Still got a T-Shirt and a hat too ;-).

I vaguely remember it being in the box (bought R4, R4.5, and R5).