German Warp 3
Dutch CDPak ver 3
Both of these are interesting.
I am not very familiar with non-U.S. releases of OS/2 (other than what I've seen pictures of online), but other than the part#, the box for this 28H6733 copy looks indistinguishable (to my eyes) from the boxes I've seen for documented part# 19H5077, which is also German red-spine (pre-logo refresh). So I wonder what the difference is between 19H5077 and 28H6733.
It is also interesting that the "special retail" Dutch copy shipped both with Dutch and English installation CDs. But what is especially interesting about the English CD is that it is part# 83G8450. This is very strange, because this is the exact same part# used for the very first CDs that shipped in the U.S., and so this is a U.S. English copy, not a U.K. English one (if the part# is accurate and not a printing error!). 1-2 months later, the U.S. English CD was refreshed with updated installer application files, and was assigned a new part# of 25H7300. So you will often see CDs from U.S. releases with both 83G8450 and 25H7300, though I think the second is by far the more common one.
The actual CDs for red-spine that shipped in the U.S. as part# 83G8450 call themselves "Program Disc", not "Installation CD". In addition, the actual U.S. CDs also had the same "US Gov't / GSA ADP" language printed on them that was discussed earlier. So I would be very curious to know if this is really identical to the U.S. English version, or if that part# is a misprint.
About the German boot image you linked, by any chance, do you know to which German Warp 3 PN it belongs?
I unfortunately have no idea. As I mentioned, I grabbed them straight from Internet Archive.
Whatever it says about them on that page is all I know...so I know only as much as you do. Unfortunately, it also looks like Internet Archive is still down following the attack on their servers this past week.