John I'm not sure if this is what you are looking for but here are the screen shots.
For what it's worth if I look in the front window of the camera I can see "294" printed on the board.
Happy to do more tests if you provide direction.
No further information is required. The pixel value stride factor is 4 which shows that the camera has a 14 bit A/D. It cannot be based on an IMX492 sensor.
Your three screenshots show a values of 2547, 2551, and 2556 ADU. These are showing that the difference between data values in the pixels is are always multiples of 4. (The exact cursor position is off center to the left from the peak on the first two.) A stride factor of 4 means that the on sensor ADU values were multiplied by 4 by the driver during conversion to 16 bit FITs. (A 14 bit value times 4 becomes a 16 bit value.) Had this been a 12 bit sensor like the IMX492, the driver would have converted to 16 bit by multiplying by 16.
So this is a 14 bit sensor and I no reason to doubt that it is an IMX294.
The only other question in my mind is whether Sony is now producing mono versions of some of their popular sensors or are they are being modified after production. Once the mono versions of cameras like the 294 and 2600 start appearing, we may learn the answer. I think it would be great if Sony has begun to see value in the astronomy market or if some other industry is also demanding mono versions of their most popular sensors. Either would be a big plus for the future of astro-imaging.