To continue, outside of some gum residue around some perfs, the green, 5-Pfennig, German South West African definitive is in very fine shape! The S.O.N. cancel from the Swakopmund P.O. is very nice, but a bit light/faded in some areas.
Lastly, as for the condition of the post card, it is pretty good for something over 113 years old. It's pretty clean. There is some wear and tear around the edges, mainly around the corners. There are also two, noticeable scuffs on the front, likely connected to the card having been in an album in the past. Noted imperfections aside, this is still a nifty piece of German Naval, and German South West African, postal history!