[Keio 4 years of accounting arithmetic] Megday

・ Keio 4th year was the Boshin War in January and the last year of the Edo Shogunate, which became the Meiji era on September 8

・ In the Muromachi period, the number of pearls was "five below the beams on the beam".

"4 on the beam on the beam" will be after the Ministry of Education Ordinance in 1945, but if there is no difference in this product biography.

In the late Tokugawa account, the "top one, the lower four", which removed the unused pearls in the direction of the speed calculation, is proof.

Dimensions: 30.3 x 6.1cm (width one scale)

Weight: 112g, 185g including accessories

Interior: "Accounting"

Extreme: "Keio 4th Summer Form is an honorary solo van who saved this difficulty."

"Passing Jiu -Jitsu Guidance Yamaguchi Kuzaemon Yoshinaga"

Location: Japan

Age: Keio 4 years (1868)

Condition: The times enter good

Accessories: Extreme Book Card

◎ Jiu -Jitsu Jiu -Jitsu: Awinju -jitsu that was held in the early Edo period became the foundation of Kodokan Judo.

◎ Kuzaemon Yamaguchi Yoshinaga ... Unknown