Guatemalan Postage Stamp featuring a Mayan Calendar

This item is a used postage stamp from Guatemala, depicting a representation of a Mayan calendar. The stamp features a white background with a prominent green decorative border, characterized by a repeating wave or 'S' curve motif. The central image is a rectangular block, likely representing a stone tablet or stele, with numerous smaller square divisions containing what appear to be glyphs or symbols, indicative of a Mayan calendar. The colors in the central image are muted browns and reds. Above the central image, in a green banner, is the text 'CORREOS DE GUATEMALA' in white capital letters. Below the central image, in a smaller green banner with the same decorative border, is the denomination '1/2' on the left and the text 'CALENDARIO MAYA MUSEO ARQUEOLOGICO' in white capital letters on the right. The stamp exhibits perforation along its edges, typical of postage stamps. A black cancellation mark, partially visible, extends diagonally across the lower right portion of the stamp, obscuring some of the text and part of the central image. This cancellation mark suggests the stamp has been used for postal services. The overall condition appears to be fair to good, with some evidence of wear consistent with use and age, but no apparent major tears or significant creasing. The printing quality seems consistent with typical philatelic production of its era.