Registered cover with manuscript 'Correo Aereo' at top franked with 3 x 1923 10c lake and 1927 25c sepia & green AIR issue (SG 424 & 455) tied by TORREON cds's dated 19 JUN 1929 with boxed registration marking in purple alongside. Addressed to GERMANY with blue 'Sunburst' registration seal and red, white & blue airmail label on reverse tied by various transit & arrival marks. Cover a little roughly opened at top.