More impending Invasion the militaries of the Warsawer contract to the CSSR: 1968, 10 Pf. Opal green in a horizontal pair on cover from Neustadt / Dosse to Dresden, thence forwarded in the Provision room the 7. Armoured division - 86 Bautzen I - with three-figure Post-office box number "427" (it was no field postal service transportation constructed, therefore not free of postage), vertical folded, RR! (Image 1) (Image)