Guatemala, 25 centavos 1979 and 2000; Honduras 10 centavos 1989 [solved]

The Guatemala 1979 25 centavos coin in my collection has the 1977-2000 design on the Republica de Guatemala side, but the 25 centavos design of the 1971-1976 coins. The first picture shows both sides at once using a mirror, the second image is a mirror view to make it easier to see the 25 design.

Does anyone know if this is an error or a missing type? I checked with the referee of Guatemala, he has not seen it in any catalogue.




The third coin in my collection I found today being of a missing type or error is my other Guatemala 25 centavos coin from 2000, as it has the 25 centavos design (small 25, straight top of 5) listed for 2011 and 2012-2016:



Again, does anyone know if this coin is a missing type or an error and the same question for the next coin as well?
Between the previous odd findings I noticed my Honduras 1989 10 centavos coin (golden color) is made of brass (1976-1995) but has the design (large year) listed for copper-nickel coins (1932-1993).



There is a saying good things come in threes!

Concerning the Honduras coin, ALL 10 centavos 1989 coins have a large date, as you can see in the comment box after that year line.
You probably compared your coin with the picture on the coin page, but that's a 1994 and only the 1989 has a huge date, the other dates for this type haven't.

Thank you, Essor Prof, for pointing this out!
I'm new to Numista and had not found this extra information yet.
The same way the Guatemala coins type problem could also be explained, it turns out my 1979 coin is of type KM# 278.1 and the 2000 coin is of type KM# 278.6.
Greetings,
Edo

Yes, at a certain moment Guatemala had the habit of making minor changes for several years within the same type.
Other countries also make minor changes within the same type (like the Honduras 10 centavos for instance) but not every minor change gets a different KM# sub number like for the coins of Guatemala.
That's why you can only compare coins with the same date to see if there might be any errors or varieties.

By the way: welcome to Numista.