Examples of the type

Picture 1 of the example of 20 Kopecks - Alexander I / Nikolai I (light weight)
© Grinya (CC BY-NC-SA)
Private collection
1820 СПБ ПД
Picture 1 of the example of 20 Kopecks - Alexander I / Nikolai I (light weight)
© Grinya (CC BY-NC-SA)
Private collection
1823 СПБ ПД – (en) Broad crown