Cosmetic roller chain in three sizes from the fertile mind of Paul Berntsen, drawn by Terry Bradley.
Not to any specific scale.
2x 50mm lengths each of nominal 1, 1.5 and 2.1mm pitch drive chains (300mm total).
Chain can be formed around sprockets etc as is , or annealed to make it softer.
Bush locomotive by Paul Berntsen in 9mm using this cast drive chain.