Button Identification Assistance

[Edelweisse]

Hi Folks: I bought these buttons in a group....and I'm able to ID the large collar button and the German Imperial Navy button....but the one with an eagle of the anchor and on the back "KON PR MARINE" "I.C.M." Thank you

[Edelweisse]

Opened wing eagle wearing a crown over an anchor...surrounded by chain on button...? What country?

[darekm]

I think it may be Italian?

[pauke]

I would suggest "koenigliche preussische Marine" per the wording on the reverse.

[Edelweisse]

Sometimes ..it’s just obvious..it’s right there in your face. Thank you for the other set of eyes. I didn’t know that Prussia had their own navy....wow. I just looked in Wikipedia...and the Prussian navy ceased around 1867. So this is for me...a fairly old button.