I guess, the problem with calling something a "internal first shot" is it confuses people. That term was made up to describe protomolds, by some of the pioneers, whom I respect, on this website. The R2 is not a promotomold. But it shows mold differences from production pieces and even differences to the first shots found in the 2004 Earth find. Some of those differences are huge. Like, the sticker, I am 100% sure the R2 has a proto silk screen sticker. More can be read about these proto stickers here
Silk-Screened Prototype for R5-D4 Sticker - Star Wars Collectors Archive
In the link, you can see it has an outline. If you look at the pics above, the R2 has that outline also and visual differences, within the sticker.
The molded plastic is creme, not white. The mold is different, where the legs attach to the body. The screw is nonproduction. The legs are hand painted. Has no coo and has no date. The differences keep going on and on. I believe this piece was created internally, at Kenner, not overseas, with an injection mold.
Just a neat piece.... -Steve