|1885 Sc1 SG-G1A||xxx|
perf 12, no wmk,
Printed at the National Printing Works, San José.
|16mm ‡ black overprint|
|1 centavo green||1||G1A|
|1c green "Gnanacaste"||-||G1aA|
|2c carmine "Gnanacaste"||2a||G2aA|
|10c orange "Gnanacaste"||3a||G4aA|
|16mm ‡ red overprint|
|1c green "Gnanacaste"||4a||G1aB|
|1c green overprinted in black and red||4b||G1bA|
|5c blue-violet "Gnanacaste"||5a||G3aB|
|17½mm black overprint|
|17½mm red overprint|
|18½mm black overprint|
|18½mm red overprint|
|1c green overprinted in black and red||16a||G11a|
|18½mm black vertical overprint|
† the listing continues in Scott  with vertical overprints in five different fonts, Sc23-41, and Gibbons  similarly. SG-G20-G35.
‡ 15¾mm in Gibbons.
Residents of Guanacaste were allowed to buy Costa Rican stamps, overprinted “Guanacaste,” at a discount from face value because of the province’s isolation and climate, which made it difficult to keep mint stamps. Use was restricted to the province. The discount ended in 1891.