1921, 10 Rp. Tellbrust green and 5 Rp. Tell boy red lilac, two horizontal se-tenants with gutter with large punching as block of four, in perfect condition mint never hinged, unsigned, very scarce unit, photo expertize Marchand SBPV (2018) : "in perfect condition. ", Michel 4.700.- (free of premium for the very scarce unit! )