Hi Ed, Jambu
Here are a couple of scans I took from my post card collection. I have been hoping I could add them to a post for some time and now that post it here
The first one is very unusual in that it is akin to a training bokin or Katana with a Tsuba guard. The second you'll see three mounted warriors with the curved style of fighting stick, no doubt the fourth has one out of view too.
The both come with indications of regions in the captions too and I am guess are from the 1920/30s.
Enjoy
Gav