34b.ni2
Nickel, not tapered, stamped MFEA | 34b.ni1
Nickel, not tapered, small Meccano stamp | 34b.ni
Nickel, post-war stamping | 34b.bs
Blackened steel, post-war stamping |
34b.zn
Zinc plated, square hole and ends ¹ | 34b.zn1
Zinc plated, hex ends and hex hole in centre ¹² | 34b.mb
Matt brass, hex ends and hex hole in centre |