About the Design:

Obverse
Head of chief Urraca facing left with date below.

Lettering:
URRACÁ
Year

Reverse
Written denomination with country name above

Lettering:
REPÚBLICA DE PANAMÁ
UN
CENTÉSIMO
DE
BALBOA

Comments
Urraca was an Indian chief from the Province of Veraguas, who fought the Spaniards in Panamá between 1520 and 1531.

Composition    Copper plated zinc
Weight            2.5 g
Diameter    19.05 mm
Thickness    1.6 mm