Hi NaotoYAMADA
The factory calibration is available directly through the device using device.readFactoryCalibration().eepromToJson(). This calibration data doesn't get overridden when flashing your own calibration so it should still be the one done at the factory.
If you have no access to the device, I can send you mine, since I have one PRO W at hand. Of course, depends on the version you are using.
Thanks,
Jaka