Found something that might help. Under coins, found this listed for the 1800s: 30 Groszy = 15 Russian Kopeks = 1 Zloty = 10 Zlotych = 1.5 Rubles. Then in 1916 the Germans released a 1,2, and 3 Kopek coin for use in the Baltic States, Poland, and northwest Russia. Then it looks like 1917-1919 had Fenigs and Marks (1 Fenig, 5,10,20 Fenigow coins). Under currency, found the following: 1 Polish Marka = 100 Fenigow (to 1919) My book starts with Zloty & Groszy in 1794. There are Talar / Talarow in 1810. 1824-1830 shows Zlotych. 1830-1866 shows Zlotych and Rubel (their spelling). Then the Marks show up in 1916 (actually 1917). German Occupation WW I currency authorized 9/12/1916 (notes dated 1917): 1/2 Marki 1 Marka 2 Marki 5, 10, 20, 50, 100, 1000 Marek Republic Issues (Polish State Loan Bank) 1919: 500, 1000 Marek 1 Marka 5, 20 ,100 Marek Then later, 1 Marka 5, 10, 20, 100, 500, 1000, 5000 Marek 1/2 Marki Inflation Issues 1922: 10,000; 50,000; 100,000; 250,000; 500,000, 1 Million, 5, 10, 50, and 100 Million Marek (I'd hate to be holding 10 Marek notes in 1922 !) Then from 1923-24 it looks like everything goes back to Groszy & Zloty/Zlotych up to today. (100 Groszy = 1 Zloty in coins shows up for the first time in 1923). About the Mr. Tymczuk's note - found the 1000 Marek note (and a photo of it) in the book. It was apparently issued under/by "Polska Krajowa Kasa Pozyczkowa." The present market value of that note ranges from 25 cents to $1.50 (for collectors). But that doesn't mean much since supply & demand of collectibles plays such a big part. Only mention this because some notes are listed as having a value of hundreds to thousands of dollars (to collectors). Actually, that may point to the relative value of the money at that time. Was thinking that it's so hard to put an "equivalent value" on money at times when the currency was so unstable (i.e., what does $100 buy in North Dakota compared to $100 in new York City, before or after a jump in inflation?) However, if the value of a collectible note = scarcity (e.g., it would be easy to find a 1, 5, 10, or 20 dollar bill in someones wallet, less common to find a $50 or $100, and very rare to find anything higher), then: 1917 - notes up to 10 Marek were common / 20, 50, and 100 were less common / 1000 Marek more rare. 1919 - 1920 - in the beginning of the year 500 Marek was less common, then afterwards everything up to 5000 Marek is very common. 1922 - notes up to 500,000 Marek were common / 1-10 Million Marek less common / 50 and 100 Million Marek were rare/very rare. Maybe this will add a little more to the picture. Cheri