穿孔: 线式 14; 线式 15; line 15 x 14.
Costa Rican regular issue of 1889 overprinted in black, horizontally "GUANACASTE" (18.25 x 5.5 mm). London print, bigger fonts.
Dangerous counterfeits exist.
Typographed by Waterlow & Sons, London using a plate of 100.
A constant error, second "第一" seems an inverted "五", occurs in position 71 but is not listed by Mi/ SN.
