I was about to enter P155 (20 Piso) in the banknote catalog today. The one difference between it and P150 is that P155 has an overprint ANG BAGONG LIPUNAN (New Society) on watermark area to right of Quezon's portrait. I then noticed that the image used for P150 has an image with the overprint (incorrect: P150 should appear just like P145 -the image for front of P145 could be used for P150).
I entered the photo currently used for P# 150 and have requested it be deleted as I do not own # 150. There are other differences between # 145 and # 150 that would prevent photo of # 145 obverse being used for # 150 obverse (according to Krause # 145 is orange and brown, # 150 is orange and blue and # 145 has heading at top in double outline and # 150 uses single outline.