I will show one example of Volga German mail from my collection:


Notification of receipt postcard from Moscow to Ekaterinograd, Samara province. The monetary equivalent of $20 is paid out on 11/1 and the card is returned registered on 14/1, reaching Moscow on the 19th. Franked at the appropriate NOR rate of 12k (i.e registered letter rate) with a vertical gutter pair. The non-standard registration label is a
blue-border insured-letter one of Ekaterinograd-on-Volga. Ekaterinograd is in the Volga German area – notice on the back the reference to "Marxstaadt", its then current name, as well as the inscription "Obl.Nem.Pov" (=Volga German oblast, i.e prior to its elevation into an ASSR).