This is a paper by Clement Nicolas that re-attacks this issue. Worn on the inside of the arm with use-wear? Nope. Try again.
Nicolas confirms Harry Folkiens' observation that these wristguards (bracers) were indeed most likely worn on the outside of the arm.
|Snip from Fig 6 of the paper|
Since we're on the subject of mounted warfare this week, let me shamelessly promote my own (more recent) hypothesis, because I think the cockstrutting explanation is weak.
I believe these archery stones were used to steady the arm by mounted archers. There's a popular Youtube Blogger, "Survive the Jive", that promoted my theory along with a graphic I made for Jessica Ryan's paper on enthesial skeletal changes... (click and wait a few seconds)
I think as we look at the Fages et al paper (Eurogenes), or the Harald Meller paper, or the skeletal indications of an archery culture (Ryan), we're looking at mounted infantry, calvary, or at the very least a culture of mounted warriors that is very unique in the history of Europe.
Clément Nicolas: "Bracer ornaments! An investigation of Bell Beaker stone ‘wrist-guards’ from Central Europe" JNA 22, 2020, 15–108 [doi 10.12766/jna.2020.2]