2.50p grey brown postal stationery envelope (H&G B15) used with added 1929 15c ultramarine and 1927 1c olive green TAX issue (SG 234 & 223) tied by CERTIFICADOS NOCTURNOS 1 GUATEMALA cds's dated 23 ABR 1928 with boxed registration marking alongside. Addressed to GERMANY with signed 'Currency Declaration' cachet on reverse with various transit and arrival marks.