The Heller is the satoshi in silver. 1000 years old. The smallest unit, at 0.5 g silver, a tiny coin. Due to its silver content, it was still worth quite a bit.

https://cdn.nostrcheck.me/b5db2c16e1037cece8fcb4e8591723a6dfc97dec76dbce250a8484ec25730230/04c5d0fa3dcf6e81e4adbf011b86874107251da5b53b8971d7bbc83f50725219.webp