The only thing that worries me is the condition of the metal saya. It looks as though it was stored in unfavorable, humid conditions. You should consult experts to halt the rusting and preserve the piece. This has a huge impact on the sword's value.
Hi Joe
congrats, you hold the holy grail of collecting NCO swords in hand.
Don't clean it. Don't rub it. Only oil slightly the blade. I would not dissamble it.
He looks very young for a seargent major.
"In the Imperial Japanese Army (IJA) during WWII, a Sergeant Major (Sōchō) was a senior non-commissioned officer. Because the rank required significant military experience, Sergeant Majors were typically career soldiers between 30 and 45 years old."
Has anyone other than Kantaro taken measurements? I don't think this has anything to do with atomic bombs or power plant accidents.
Moreover, the Tsuba do not date from the 2011 timeframe.
I have two, because one of them is already nearly 20 years old, and I don't know how long the Geiger tubes last. Now I have a new one as well. However, the readings from the old one are still accurate.
Just for fun, I took some measurements of my collection using two different Geiger counters. I noticed that the old *tsuba* actually registered slightly elevated radiation levels. One Tsuba from the Muromachi period, featuring gold inlay, really started clicking away. Everything is still well within the safe range — but where does it come from?