Super Satisfying Superior Bone Rings on Sky Blue Card row boat which identifies the subject as

which identifies the subject as a member of the Kikuyu tribe (also known as Agikuya) a Bantu tribe native to Central Kenya which comprises about 20 percent of the Kenyan population

I have only found one other like this

Steel I believe

and have included a 1912 advertisement showing this same roll in photos

Super Satisfying Superior Bone Rings on Sky Blue Card row boat which identifies the subject asA perfect exemplification of the fact that inexpensive little things can deliver as much pleasure and aesthetic satisfaction as "significant" ones. I'd hang this next to a Sol Lewitt or Agnes Martin or Donald Judd if I had one handy, ha. Like a grid of life buoys, too. Or clouds in the sky. SUPERIOR. 4 3 8" x 2 3 4" 1940s. Some wear around the edges of the card, all to the good I think.