So I was noticing, a majority of the Swiss coins' design have gone majorly unchanged for over 100 years.
Disregarding planchet material changes and very minor die updating the longest of these is the 2 Franken. The Ob and Reverse of this has gone relatively unchanged for 139 years. If you count the Reverse only, it's 163 years.
5 Rappen
Obverse and Reverse: 1879 to Present: Approx. 134 years
Reverse only: 1850 to Present: Approx. 163 years
https://en.numista.com/catalogue/pieces167.html (Reverse only)
https://en.numista.com/catalogue/pieces168.html
https://en.numista.com/catalogue/pieces169.html
https://en.numista.com/catalogue/pieces170.html
https://en.numista.com/catalogue/pieces171.html
10 Rappen
Obverse and Reverse: 1879 to Present: Approx. 134 years
Reverse only: 1850 to Present: Approx. 163 years
https://en.numista.com/catalogue/pieces172.html (Reverse only)
https://en.numista.com/catalogue/pieces173.html
https://en.numista.com/catalogue/pieces174.html
https://en.numista.com/catalogue/pieces175.html
20 Rappen
Obverse and Reverse: 1879 to Present: Approx. 134 years
Reverse only: 1850 to Present: Approx. 163 years
https://en.numista.com/catalogue/pieces176.html (Reverse only)
https://en.numista.com/catalogue/pieces177.html
https://en.numista.com/catalogue/pieces178.html
1/2 Franken
Obverse and Reverse: 1875 to Present: Approx. 138 years
Reverse only: 1850 to Present: Approx. 163 years
https://en.numista.com/catalogue/pieces179.html (Reverse only)
https://en.numista.com/catalogue/pieces180.html
https://en.numista.com/catalogue/pieces181.html
1 Franken
Obverse and Reverse: 1879 to Present: Approx. 134 years
Reverse only: 1850 to Present: Approx. 163 years
https://en.numista.com/catalogue/pieces183.html (Reverse only)
https://en.numista.com/catalogue/pieces19980.html (Reverse only)
https://en.numista.com/catalogue/pieces184.html
https://en.numista.com/catalogue/pieces185.html
2 Franken
Obverse and Reverse: 1874 to Present: Approx. 139 years
Reverse only: 1850 to Present: Approx. 163 years
https://en.numista.com/catalogue/pieces187.html (Reverse only)
https://en.numista.com/catalogue/pieces19981.html (Reverse only)
https://en.numista.com/catalogue/pieces188.html
https://en.numista.com/catalogue/pieces189.html
So, my question for you guys is: What others coin designs have lasted a good stretch of time, even if they have ended their circulation cycle? Let's set a year-bar of say about a 75+ year stretch but post whatever. :)
EDIT: Please provide links, maybe like above, for ease of clicking. thanks!