Japanese / Chinese Coins And Charms , ID Help - 6/9

Top row 1 2 3, bottom row 4 5 6. I am concerned about the authenticity of all but number 6, due to their similarity in colour. These coins are spread across 2000 years of history; they shouldn;t all be the same colour.

Coin 1: coin of the usurper emperor Wang Mang, Da Quan Wu Shi type. Your pic is upside-down.

Coin 2: a "horse charm", probably for a "Year of the Horse" thing.

Coin 3: it's a little too blurry to see this one clearly enough to ID it.

Coin 4: A "4 characters obverse, pictorial reverse" charm.

Coin 5: the earliest cash coin design, a "ban liang" of the Han dynasty. It looks a little too small to be a genuine ban liang.

Coin 6: the only authentic-looking piece here. This one is a Song Dynasty coin from the Yuan You period (AD 1086-1094), seal script variant. Zeno example: https://www.zeno.ru/showphoto.php?photo=367362 The "doubled hole" is a minor production error; the coin was rammed onto the lathing rod twice, creating a star-shaped hole.