Frederik III Coronation Coin from 1648

Hello, I found the following coin in my parents place (North Germany, close to the Danish border). As far as I found out its a Danish coin from 1648. https://en.numista.com/catalogue/pieces111028.html
Online I read that it should weight 4.8g, ours is about 2g heavier - 6.924g
What does that tell about our coin?
Thanks and greetings. Antje

https://en.numista.com/catalogue/pieces111027.html

Looks like your coin and is about the same weight.

Thanks!
Do you know the value of that coin?

Sorry, I cant help you with the price.

https://www.ngccoin.com/price-guide/world/denmark-1-4-speciedaler-km-161-1648-cuid-1050691-duid-1237388
I doubt it's real, better check the weight.