No OEM, but original
The outer pins are the power pins.
Edit: in the net there is often told that there were 5 pins. As you can see, my original had only 4 pins. and all of my oem chargers has 4 as well. Sry 4 bad picture, was missing 3rd hand
Edit2:
wtf? Did upload 2nd picture with OEM Charger at my multimeter. Saw it online, than disappeared? Wanted to show: If you put the charger pins on the right, the upper one is 5V, lowest one is GND.
Edit: re-appeared? hmmm...
grml. Would like it at this price.
Did u try adb? Not a single oem is working with adb at me in the moment, have no original left. Think i already used the oem in pic 2 by adb, but not sure.
Have one charger as you linked. (think so, looks identical) Charging "hmmm", adb "no way" - but not sure if adb is a problem of my watch or the charger.
Would like to return to stock. But i dont like spending 30+€ for original charger when dont know if adb will work or is a problem of my watch. therefore i would more like to save the money f.e. for a hw2...