Prussian coinage questions

Hello!
Recently I started doing more research on Prussian coinage and found out that it is rather complicated. I have a few questions:
1. Does anyone have some online books or any other literature about Prussian coinage. (My main focus is on Vereinsthaler (1821-1873))
2. What is a difference between KM405 & KM430; KM451 & KM480; --is it just the ruler change? If so, why is that? Shouldn't these coins be the same type or am I missing something? This also applies to other coins, I just gave two examples.
3. What is "Mining thaler"? Why was it used? Is it different from regular thaler? I would like to read up on it more.
4. How do we know that KM497 is commemorative? Is it by only difference (between KM497 & KM494) that is laurel wreath on rulers head? If so, how is that telling us what is the commemorative event?
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I have read a great thread here and it was helpful but I would like more answers. I also read a lot of wikipedia and other stuff from google but I couldn't find anything detailed or good written in one place like that thread. Real numismatic literature with history details would be amazing.

Thank you in advance!

Hello gabz


1
The to go book is probably this one here
https://www.battenberg-gietl.de/produkt/die-muenzen-des-koenigreichs-preussen-von-1786-bis-1873

2
Better to post the links directly so that everyone does not need to search everything again.
KM405
https://en.numista.com/catalogue/pieces9461.html
KM430
https://en.numista.com/catalogue/pieces44004.html
KM 405 and 430 yes they looks the same but are referenced seperatly due to the ruler change.

KM 451
https://en.numista.com/catalogue/pieces10405.html
KM 480
https://en.numista.com/catalogue/pieces4228.html
The same with 451 and 480

3
The Term used normally is https://de.wikipedia.org/wiki/Ausbeutem%C3%BCnze Ausbeutetaler
Some sources translated in into english into mining thaler
A term that became common in the Germanic countries especially in the 16th to 18th century.
When larger amounts of silver ore where found at certain mines coins would be minted out of them some indicating on the coin itself from which mine this came from.
Stolberg for example is a town which grew in wealth only from mining silver ore resulting in many silver coins produced.
Some Ausbeutetaler will show on the coin by symbol or image that it was minted from silver ore found at the mine.
https://www.acsearch.info/search.html?id=946225
some coins also showing the mines themselves
https://www.acsearch.info/search.html?id=1613507
The reference for such mining coins is Müseler https://www.booklooker.de/B%C3%BCcher/Karl-M%C3%BCseler+Bergbaugepr%C3%A4ge-Dargestellt-auf-Grund-der-Sammlung-der-Preussag-Aktiengesellschaft/id/A02vtN8J01ZZf


4
because that is described in historic books and all written sources of the time of release of the coin. Yes as a sign of victory a wreath was added on the king's bust
It was part of the https://en.wikipedia.org/wiki/Austro-Prussian_War

Thank you for your answer. It was very helpful! Sorry for not providing link in first place.