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37. USSR KL Overprint
Unknown 36 Back to UPO Home Unknown 38
| A stamp of the USSR (Yvert 611) with the overprint "K. L." [Fabio Vaccarezza] |
| Probably KL means "Konzentrationslager", so (false or true the overprint), the stamp could refer to Prisoner of War camps. [Fabio Vaccarezza] |