The Sokolka Ghetto was located in the Bialystok region approximately 20 miles from the Soviet border.
Most of the residents were murdered in 1942 and the ghetto was destroyed in January 1943. There is only one denomination known 0.91 mark. One theory for the odd denomination is it was the amount of pay for a days work. The notes are known to exist in two colors, rose and beige, however the beige notes have been found to be counterfeit laser copies. Legitimate notes also have a perforated left edge. Genuine notes are very scarce.