That's not turbo. They gave you 72 pin SIMM slots and did away with the MO connector.

That indeed looks like your regular 25mhz 040 board. I need more detailed photos of the board and the crystal speeds. If this actually is running at 33mhz and not 25 on a 33mhz part this is the first board known to be doing this. It could be a very late revision or even a prototype precursor to the Turbo series.

Edited: Hey wait a minute. You have yellow silkscreening. All 040 boards I've seen either have white or none at all.