Print On Both Sides With Different Stamp On Back

This stamp comes from Georgia, circa 1921 I believe.

I'm not sure if this is very common for the area and time.

I believe what happened is that, prior to the Russian revolution, the stamp was valued at 20 rubles. (Georgia had a relation to Russia, which was its protectorate.).

Afterwards, when the USSR was formed, hyper-inflation occurred. With poverty abound, they took existing sheets, and printed on the reverse new stamps (similar to Germany's million-dollar stamps).

Eventually, they devalued the existing currency, similar to what Russia did in the 1990s. Thus, it ended up the the 5 kopek overstamp.

Is this unusual, or pretty common for the area and time? I paid a bit for it, but I suppose that doesn't mean too much, and am wondering if I should pay to get it authenticated, if it has any value?

To be clear, I meant to say that the value of the stamp increased from 20 to 40,000, similar to other global inflationary increases like that in Germany at the time, not that Germany "intentionally" did any printing on both sides at the time.

The brown stamp on the back is a revenue stamp. It was common practice for Georgia to print on the back side of these including other revenue stamp values. Might be worth $10 or so.

Thanks rogdcam, appreciate the info.

Yeah, that's how much I paid.

It's disappointing to hear that it's not as uncommon as I thought.