I picked up one this weekend I hadn't thought was possibly being in the time of hyperinflation, but after noticing the date of Dec 1923, that was at the time the German Gubmint began to print money with some umpff! This is backed by GOLD, says to the effect of being traded in NYC as a dollar in gold. Could that really be, was America recognizing German banking at this time of the Weimar startup?
This is an example of wertbestandiges notgeld. This was a short lived attempt to stabilize the German currency by pegging it to the US dollar at a rate of 4.20 gold marks = $1.00. The introduction of the rentenmark made the gold mark obsolete.