Button help please........

[Kam in MN]

I was going through my deceased Father-in-law's metal detecting finds and came across several buttons.
How old, are they authentic, what are they??

Any help would be appreciated. I thought that the people who frequent this forum may be able to help with the questions.

The first photo is a flat button but it looks as if a loop may have been attached at one time. (57S)
The next photo looks to be two Navy buttons, they have anchors on them.
The eagle insignia looks to be very old because of the shape of the eagle's head.
The crusty eagle button also had a loop at one time.
The two buttons with the crowns were found in two different locations but one is smaller than the other.

Thank you in advance,
Kam

 

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[Bigcypresshunter]

nice buttons. The crusty eagle is the seal of the US button used by our military since 1902.

I found the same anchor eagle in my backyard.

 

[Montana Jim]

1920s-1930s Collar brass, US Army Infantry, Company S, 57th Division (?)

US Navy Eagle/Anchor button (date depends on manufacturer & back/mark)

Waterbury Button Company gold club button - blazer / civilian / fashion - pattern number 80020 - still made today http://www.waterburybutton.com/cart/pc/viewPrd.asp?idcategory=46&idproduct=28804

US Army Cap Badge - Officer

US Army cap badge / button - Enlisted

Waterbury Button Company anchor button - blazer / civilian / fashion - pattern number 80900- still made today  http://www.waterburybutton.com/cart/pc/viewPrd.asp?idcategory=0&idproduct=29493