90's K'Nex Logo Strapback Cap Eco B1 - ∆Mᵢ⁻¹=−α ∑ Dᵢ[η][

B1 - ∆Mᵢ⁻¹=−α ∑ Dᵢ[η][ ∑ Fjᵢ[η−1]+Fextᵢ [η⁻¹]]

commonly called the "Red Cross Book" by English-speaking fans due to its front cover

classic tailoring and inflatables

Genesis P-Orridge

90's K'Nex Logo Strapback Cap Eco B1 - ∆Mᵢ⁻¹=−α ∑ Dᵢ[η][Super vibrant 90's promotional cap for K'Nex the brilliant kids contruction toys Features large multi coloured front embroidery of the classic K'Nex logo sitting on top of various component pieces, and a mini logo embroidery hit on the back. Black cotton hat with contrasting bright red peak. The hat itself is in great condition with subtle fading and the embroidery remains bright and bold. An awesome, playful 90's piece fully loaded with nostalgia