My 3 Denmark Coins Info Request

Coin #2

All three are 2 Ore pieces as you can read. Number 1 was minted while Christian IX was the King of Denmark. Can't read the date from your picture but there are two variants based on the initials of the mintmaster: 'C-S' from 1874 to 1892 and 'VBP' from 1894-1906. The condition of your coin doesn't look too good, so if it isn't 1876, 1887 or 1892 it's just a filler.
The second and third are both from the reign of Christian X, the second I can read the date 1937, a very common coin.
The last was minted between 1913 and 1923, there are 4 different types which I cannot distinguish based on your pictures: 2 different mintmaster initials and two different materials; all except the bronze from 1913 and iron from 1919 are very cheap.

Have some of those in my world coin collection (thousands of different currency coins from all over the world) but my focus has shifted to ancient/medieval coinage. Rarely add something to the more modern part of my collection/accumulation, just a coin from new countries coming up or those I don't have yet and a coin from every year. Finding all those cheap coins in junk boxes was a lot of fun.

Thanks you both!:)