birds in flight (light blue)
value: FRF
red imprint

without extra imprint
extra imprints: LETTRE / E / C / J+1D / J+1R / J+2N

birds in flight (light blue)
value: FRF
black imprint

without extra imprint
extra imprints: LETTRE / E / C / J+1D / J+1R / J+2N