Earlier in the thread we determined SN #2408 has silver cables. You should post your serial number so people can roughly gauge when this running production change happened. By posting the serial number, we will also be able to determine if Sennheiser does or does not return to shipping HD 800 S headphones with black cables (it could be a temporary production change due the supply issues).
Sennheiser does not build HD 800/S headphones perfectly sequentially and the production of serialized headbands and the insertion of accessories in the box is somewhat randomized. For example, this photos shows
one technician at Sennheiser has a totally separate bin of serialized HD 800 headbands (see right side of photograph) at her workstation and therefore the serial numbers cannot be perfectly assigned sequentially. Each technician on the small HD 800/S production team has their own bins and each technician produces the headphones at a different pace. The second photo shows the randomized insertion of included accessories.