1916 Postal stationery field postcard 5l. blue used registered from Volos to Davos Platz, Switzerland and retour, uprated by 14 obligatory tax stamps on front and on the reverse, all tied by "VOLOS/21 FEB 18" c.d.s., Reg. label "VOLO", light strike of sender oval, Italian censor h/s, 'Bologna Posta Estera' transit cds and two-liner "NON ADMIS/RETOUR à L'ENVOYEUR" alongside, and on the reverse with 'Posta Estera Milano' and Athens transit datestamps as well as Volos arrival cds, with a few traces of usage otherwise fine. (Image)