I found another such chip. This chip is also signed as "FL128PIF" (247QQ023 C). Again no "0" or "1". Writing with "S25FL128P......0" works perfect, but writing with "S25FL128P......1" fails! So i guess this chip is also a "0" like my other chip.
Can we say both of these chips are "S25FL128P......0"? If yes, then i do some more tests to be sure it works OK so we can mark it as working.