Time to finish this one off and move on -
The submunition on the avatar is Dutch in origin, known simply as a PLP (Plaatladingprojectiel). It was an experimental series of submunitions from the mid 1960s that never saw service. At least 20 veriations have been seen, with differences in size and stabilisation most common.
Although it never entered use, the inert examples were well distributed. I saw my first one in Arizona in the late 1980s, the thought then was that it had probably come out of Yuma Proving ground, maybe related to the M42 program - way off. I saw a couple more over the years, and finally when arriving in the NL the facts came out.
I offered this one as the avatar, first because it had good lines and would show up well in a small photo, but also because it represented something typical of submunitions - its weird, unusual and looks like nothing else (except, perhaps, an ice-scaper).
Here are a couple of shots of some variants in my collection, followed by a few documents.