Hi. Thanks for taking the time to sort through my somewhat confusing post.
I'm looking to buy new spoke nipples to replace the current oxidized ones on the wheel. Spokes are in great condition but the nipples are so-so and if I am swapping the rim I may as well get nice, new shiny ones with good or better gripping power.
What I take from this is it is almost for sure brass 14g with a length of 12mm and diameter of 2mm.