I finally have the sword in my possession and this is a good example of a blade that has to be appreciated in hand. The photos don't really show the hataraki and nie too well and the forging is so fine a macro lens is going to be needed to do it justice. I will try my best when the lighting is good.
Photos don't give an impression of dimensions so here are the specs
Nagasa: 62.3cm
Sori: 1.3cm
Motohaba: 2.57cm
Sakihaba: 1.61cm
Kasane at the mune: 0.57cm
Kasane at the shinogi: 0.72cm
Sakikasane: 0.46cm
Kissaki: 2.7cm
Tanobe sensei politely called it "a slender and delicate shape". At 447g it feels very functional for wielding one handed.
What can be inferred from these measurements? Was a slim, lightweight blade with a nagasa close to the minimal length for a katana popular in certain eras (originally close to 74cm per the dealer)? This sugata seemed more common in the Heian/Kamakura periods rather than the Nanbokucho.
I found an oshigata for a beautiful Juyo Go Yoshihiro. I believe this was sold by Darcy. The features that I immediately noticed were the ichimai boshi with hakikake and the prematurely ending bo-hi at the kissaki (similar feature on my blade). The hataraki is on a whole different level on this blade, and really illustrates that even though his career was short-lived, his style evolved noticeably, adopting more Soshu style character.