Ubu Nambokucho or earlier tachi. Signed with a mei of Yukihira, which I do not have confidence in. This is a long tachi with its original sugata fully intact, measuring 70.85cm. Moto-haba is 26mm and kasane is 5mm. The jitetsu is quite worn. The hamon is suguha-based and the boshi is fully intact, but the hamon becomes quite indistinct (shimiru) in places and there is a tsukare-utsuri throughout the ji due to condition. The sword interestingly has an original maru-mune. There is a koshirae (photos shown below), but the tsuka is not well-fitted to the sword.
$1,600 (plus shipping and PayPal).