what is it?

[ncblksmth1]

What are these?

[ToxicGas]

The blue ribbon would be worn on the uniform of someone who had been awarded the '25 years faithful service' medal, I would assume. 'Für treue Dienste' is on the reverse of the actual medal.

Mat

[Walkwolf]

Both are common items...........

[Walkwolf]

WWI Imperial German medal bar representing the Iron Cross 2nd Class,
Hindenberg Cross with Swords for combattants, and a civil 25 Year
'Fathful Service' Cross of the Third Reich era, as Matt says.

The button/pin is refered to as a 'Tinnie' and these usually
commemorate an event - in this case, the 1st of May,
which carried significance within the Nazi regime.