GUATEMALA. Banco de Guatemala. 1/2 Quetzal, 1948-54. P-23. PMG Gem Uncirculated 65 EPQ.
Printed by ABNC. Original. First Date - 1948. Only two examples graded higher on PMG's population report though it's not clear if those carry this rare date or are the other dates available for the type.
Estimate: $150 - $250