Two parallel horizontal grooves, having between them the LONDRINA plank, coined in low relief. Dos surcos horizontales paralelos, con inscripción `LONDRINA` acuñado en bajo relieve.
Obverse lettering
LONDRINA (Translation: Londrina (Service of telephone communications of Londrina (Paraná) Londirna (servicio de telecomunicaciones de Londrina (Paraná))
