011525, 141101, 241301, 260307, 260701, 280105 - Other natural phenomena and observable events. Keys with heads of circular, oval or lobed shape. Cross, Latin (shorter horizontal lines). Ovals with a decorative border, including scalloped, ruffled and zig-zag edges. Plain diamonds with single or multiple line borders. 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.