@bruces I suspect that might be an ear wax scoop rather than a hairpin.

https://en.wikipedia.org/wiki/Ear_pick?wprov=sfla1

Also reading your article wondered if you knew about the history of the bollock dagger. Tod's Workshop has a good history with examples here: https://www.youtube.com/watch?v=ixIKaNRpEvY (If you know about how they were carried they make more sense)