Chinese cast cash identification

Hello, I am usually good with cast cash type coins but this one has had me stumped. I assume Northern Sung/Southern Sung dynasty but doesn't seem to be a common type. 4.3 g , 24.5 mm

Obviously, it's Zheng He Tong Bao.政和通宝（政和 means peace of society and politics）

N#20606

The question is, cashes of SUNG are of numerous varieties. Some differences are hard to recognize. You need to know something about features of cash: https://www.163.com/dy/article/GQ3B9SKM0523D470.html

For Zheng He, you need to know something about them: https://www.163.com/dy/article/H1IGKIF50523D470.html

For its radius, it's 小平(basic, equal to 1 cash) and not made of iron; For its rim, it's 阔缘(wide rim); For the character, it's 重和样真书(Zheng He Zhong Bao style's 和（no hook on He), written by the emperor==normal writing).

It's very common, instead of looking for further features. The cash are provided by resource within kilograms, and it's in very normal style. Clear letters with beautiful stain colors may value 15-30 CNY.