Pin/Button, Cuff? and What the heck?

[Sc0tty]

Ok so I found this today at an old site where I have found stuff from the 20's. It looks like a pin or button of some sort with a ship on it? Maybe a sub? The back really throws me off as it has 2 round something or others that look like my reflect how it attached to something. The nasty coin is a clad quarter for sizing...



I believe this is a cuff link but not sure how old. I found it 2o' from a 1908 Barber Dime so the area is old...



This I have no clue. The round portion is threaded like a screw and the other portion..the part that looks bent actually spins around on the threads and can go up and down on them. It's some mechanical nic-nak but I have no clue...

Thanks for any help folks!!! GL hunting!

 

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[TomPA]

Your "no clue" item looks like part of an earring, but help on the size is always good.

 

[Joe-Dirt]

That’s the side view of a WWI tank

 

[fyrffytr1]

Joe-Dirt nailed it on the disc. I found one very similar that dates it to late WWII and later going by the attachment style on the back. It is a collar disc worn on the collar of a military uniform. The two round discs on the back would have had a pin sticking up from each one and they would have a Ballou style clutch to hold the disc to the collar. The first link is to the one I found similar to yours and the second link is to a site that helps to date collar insignia. Scroll down to the bottom of the page to find your style back.
Overlooked Military Surplus -- WWII Armored Tank Collar Disk

Dating Metallic Insignia: Collar Disks