Hi,
I can help a little bit. In the top scan there are three 50 yen notes on the left. On the top note, with the picture of Mt. Fuji and the red #933, you can see a verticle line of print in white along the left border. From top to bottom, the first 2 kanji make up the word Showa, which is the name for the reign of Hirohito as emperor. The next symbol that looks like a cross or a t stands for 10. Finally you have 3 lines that make up the number 3, and the final symbol refers to a year. So the translation is the 13th year in the reign of Hirohito. He became emperor in 1925, so the bill is from 1938.
In the other 2 bills you can see the same pattern repeated directly under the bird's tail on the right. The only difference is that after the 10, the next symbol is a 7 so the bills are from the 17th year of Hirohito- 1942. I can't see any year on the the other 4 notes, so I hope this little bit of information helps.
Jeff
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