Hi,
I believe it's this one:

Info on this page:
https://arduinoinfo.mywikis.net/wiki/SensorShieldThere are several "Sensor Shields" out there, and the numbering is not definitive. This one was a final update done by the originator of the idea, my friend Xiao from Beijing.
There is a popular version sometimes called Version 5X that allows the power pins to be fed from an external power supply.
And I helped with the design I make as the YourDuino RoboRED, which has all the signals brought out to 3-pin sockets, plus 4pin sockets for I2C and Com like the shield you shows has.

We all learn/steal from each other :-)