Literature. GUEZALA AYRIVIÉ, A., '6 CUARTOS 1850 – Planchas, defectos, retoques, matasellos', Ediciones Grupo Filatélico, Bilbao, 1936, hardbound (somewhat dirty), 355 pp. Used. Scarce.
A buyer’s premium of 25% plus a 20 SEK lot charge is added to the hammer price
