前田利家公の算盤
https://i.postimg.cc/zXGpCB1q/jp-or-soroban-www-assets-images-howto-history-img-4-2x-035-Y88-21-0211-165247.jpg
https://i.imgur.com/egruV7n.jpg
＊
http://www.world-egg.co.jp/shuzan/rekishi/img/rekisi05_2.gif
前田利家公の算盤
https://i.postimg.cc/zXGpCB1q/jp-or-soroban-www-assets-images-howto-history-img-4-2x-035-Y88-21-0211-165247.jpg
https://i.imgur.com/egruV7n.jpg
＊
http://www.world-egg.co.jp/shuzan/rekishi/img/rekisi05_2.gif