（解説文要約）
左下に1973年と記されています。昭和48年、作兵衛翁81歳の頃の作品です。
昭和48年頃は、筑豊にあるほとんどの炭坑が閉山していった時代です。
全盛期を懐かしんで描かれたものでしょう。
スキップとはボタ山にボタを運ぶ運搬車です。
Sakubei wrote the production year of this painting at the bottom left as 1973, when he was 81 years of age.
At that time, most coal pits in Chikuho were closing.
This painting supposedly drawn feeling nostalgic about the prime of his coal pits.
The skip is the car to carry rock refuse, which is being wound up to the top of the refuse heap on the left in this painting.