Approver Comments:
Good. Both are students, and both live at the same addresses Rembrandt Strasse 1, then Hohensteiner Strasse 11 Flat 14b. Clearly, the two entries for Jerzy Jedwab are for the same person (despite birth dates that are one year off). Even though 1927/1928 would have put Jerzy on the young side to have been in gymnasium, I think you are probably correct that he signed the album. That said, you cannot discount the possibility that Jakob Wolf Jedwab (b. 22/05/1922) may be the boy who signed the album.
