Costa Rica 20 Colones, 1972, B524a, P238a, aUNC

Description

These have slight ripples in the top and bottom edges that do not extend into the design, that appear to be counting ticks, plus some light foxing.
TBB: B524a
Pick: P238a
Issuing Authority: Banco Central de Costa Rica
Series: 1968–1992 Issues
Year: 1972
Signature: 30. Arias/Volio
Substrate: Paper
Size: 156 x 67 mm
Color(s): Brown, Pink, Green
Printer: American Bank Note Company