A finely mounted Bizen daisho
The katana by Osafune Kiyomitsu, dated 1575, the wakizashi by Tomohide, Edo period (1615-1868), 18th century, the koshirae 19th century
Katana
Sugata (configuration): honzukuri, iorimune, toriizori, extended kissaki
Kitae (forging pattern): flowing itame hada with jinie
Hamon (tempering pattern): suguha mixed with slight notare with nioi, nie, sunagashi and bo-utsuri
Boshi (tip): ko-maru, hakikake
Nakago (tang): ubu, machiokuri with one hole and katte sagari file marks, katana mei Bizen no kuni no ju Osafune Kiyomitsu saku and dated Tensho sannen hachigatsu kichijitsu (Auspicious day in the eighth month of 1575)
Habaki (collar): one-piece, silver-foil
Nagasa (length from tip to beginning of tang): 28 1/4in (71.6cm)
Motohaba (width at start of tempered edge): 1 1/4in (3.1cm)
Sakihaba (width before tip): 7/8in (2cm)
In shirasaya (wood storage scabbard)

Wakizashi
Sugata (configuration): hirazukuri, iorimune, slight sakizori
Kitae (forging pattern): ko-itame
Hamon (tempering pattern): choji midare in nie with yakidashi
Boshi (tip): long kaeri
Horimono (carving): bohi on the omote side, futatsuji bi on the ura side
Nakago (tang): ubu with one hole and sujikai file marks, signed Tomohide
Habaki (collar): one-piece, silver-foil
Nagasa (length from tip to beginning of tang): 15in (38.1cm)
In shirasaya (wood storage scabbard)

Daisho koshirae
Comprising a pair of nashiji saya designed as stalks of bamboo and mounted with shakudo hardware carved with crashing waves, the dots of foam highlighted in gold, the shakudo sukashi tsuba carved with blossoming peonies, the blossoms gold takazogan, each signed Bushu ju Masa( ) and with a kao, the tsuka both fitted with shakudo fuchi-gashira matching the saya hardware and signed Yanagawa Renju and with a kao and Tomochika and with a kao and with Ishiguro-school gold and shakudo menuki carved as peacocks, the wakizashi fitted with shakudo nanako-ji kozuka and kogai carved with writhing dragons in high relief

source: https://www.bonhams.com/zh-cn/auction/24721/lot/404/a-finely-mounted-bizen-daisho-the-katana-by-osafune-kiyomitsu-dated-1575-the-wakizashi-by-tomohide-edo-period-1615-1868-18th-century-the-koshirae-19th-century/