Micro design elements on coins

I remembered that the 500 yen coins had a little hidden design element not easily seen by the ordinary coin collector ... it spells the country name NIPPON. So I made some pictures at work today.



Does anyone know of other circulation coins with similar design elements?

I remember there was an old thread about the morse code message on the rim of the Canadian WWII nickels:
https://www.fliegerfaust.com/we-win-when-we-work-willingly-hidden-morse-code-message-2450389919.html

https://en.numista.com/catalogue/pieces671.html this is a amazing example of micro design coins ,when I first discovered that the year of issue is written in the small star ,I was very amazed how the engraver has done it ,luckily i have this coin and see the date clearly ,the on numista picture we cannot see it ,I don't have a high resolution camera to upload the picture ...

Cita: "Idolenz"​I remembered that the 500 yen coins had a little hidden design element not easily seen by the ordinary coin collector ... it spells the country name NIPPON. So I made some pictures at work today.
​
​
​Does anyone know of other circulation coins with similar design elements?

​
https://soranews24.com/2016/12/08/japans-500-yen-coin-has-two-hidden-messages-and-heres-where-to-find-them-%E3%80%90photos%E3%80%91/

Here is the article i came across a few years back. Enjoy!

The new UK 1 Pound has some ...



Excuse the night-time pictures. On the obverse is ONE POUND near the edge;
also below the portrait is a shield with a £ hologram. On the reverse is the year
near the edge - so is dated on both sides.