260102, 260128, 260713, 260721, 260728, 280105 - Plain single line circles. Miscellaneous circular designs with an irregular circumference. Two diamonds. Diamonds that are completely or partially shaded. Miscellaneous designs with overall diamond shape, including letters forming or comprising a diamond. Inscriptions in Greek characters, including the following: Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ ς Σ σ Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω.