With the part number A4513502400 it corresponds to the most advanced revision available for the smart ED3 (BR 451) and is compatible with the older part numbers.
The transmission comes from a European crashed smart ED3, which was built in 2015 and drove approx. 80,000 km. Workshops also like to call it "reduction".
The gearbox is explicitly sold as a functional used part, it is not a new part. If it is installed by persons without a high-voltage certificate, the used part cannot be taken back. The installation must be carried out by qualified personnel, otherwise there is danger to life and limb.