蝶番 "cho-tsugai" or "cho-ban" (butterfly pair) is the J term for this kind of hinge, although I believe it can cover symmetrical hinges like opened seashells, and even reticular things like joints in your backbone. too.
Anthony, what a treasure you've found! The colour scheme is a little a too bright for my taste, but the quality so far is outstanding! And it just keeps on getting better with every photo you post... Loving those gold fukurin!
Here is the mempo. russet, tare in Hon Kozane. asa nagashi no ana in the shape of an inome. Also the hana no ana is in the shape of inome.
I notice 2 things, the asa nagashi no ana is not perfectly aligned. Also the hana is of center, looking like an old boxer. Regarding the latter I would think maybe it has been hit back in the days. I se no reason to loose quality in the men. You know what I mean after you have seen the kabuto.
I was watching a Japanese video on applying shu-urushi, during the cutting back section the craftsman cut straight through the red and exposed the black urushi underneath on one edge, which is a goof-up.
He stated that this was artistic flair and that he enjoyed to express himself in his work this way.
The Japanese view things differently to us, a bent hooter to many looks wrong, but to the samurai it is unique expression reflecting individualism.
Rule N01 there are no rules Rule N02, there are no fuck-ups, its all art.
I've seen a similar features once when on the gessan there was kusari, or the entire yurugi-no-Ito made of silk and kusari, but kikko in that place is the first time for me, thank you for sharing these pictures; nice armour, I'm looking forward to see the last pictures!!
The feeling of high end armor continues with a lot a nice details. I find it very intriguing that every kamon has been carefully replace by a piece of shakudo. I know removal of family kamon was relative common in order to obscure the origin. But you can't help to wonder who might have owned it. Well, just the cherry on the cake left
The Black rice cake 黒餅 家紋 "Kokumochi" Kamon was used most famously by the Kuroda who fought for Hideyoshi and then Tokugawa Ieyasu and finally took their seat in Fukuoka in Kyushu. Often a black circular spot, especially on armour, but they had white and gold versions too.