35c yellow green, 50c grey blue, 1b brown, 2b carmine & 3b blue grey AIR issue all fine mint. (SG 247/51) (Start Price = £8.00)

Air ovpt 1B black and red brown fine used (Start Price = £88.00) (Image)

Air ovpt set(6) fresh mint, the 5c on 10c has a light crease (Start Price = £88.00) (Image)

50c mauve and 1b chocolate AIR issue the two top values fine mint. (SG 270/1) [US3] (Start Price = £1.60)

Headed 'Ejercito de Bolivia Servicio de Comunicaciones Campana del Chaco Radiograma' folded form used from LA PAZ to SUCRE with BISECTED red & white 'SERVICIO RADIOGRAMA' official seal tied by 'SERVICIO RADIOTELEGRAFICO ESTACION C.P.S.1 SUCRE BOLIVIA' cachet in purple (torn in half where form was opened). With similar cachet inside. Form is torn in half and repaired with sellotape. Very rare Chaco war item. [US8] (Start Price = £9.60)

Registered cover franked with 1935 1b orange yellow and 1938 15c green (SG 296 & 330) tied by undated CORREO MILITAR SANTA CRUZ cds with red & white registration label alongside. Addressed to GERMANY with various transit and arrival marks on reverse. [US8] (Start Price = £8.80)