The “HA” on your Danish headstamp stands for "H
Not to forget the mark “HL”.
HL= Haerens Krudt Patroneret i Laboratorievaerks
I should have included the HL headstamp for the full story in my answer. I didn’t think of it since it predates the HA headstamp. I only thought about after HA. Good catch, you guys. I try to give pretty complete answers, but…! Yeaq, I get lazy.
Us all included nobody is perfect…