Thanks for all the comments, I really appreciate it!!! 

some nice new items you got.

nice patches!

that's a really nice helmet with some great history!-also love how its fixed bale.

its up to you and is completely your decision, but I would keep it and maybe try to pay more attention to it or display it somewhere.

I’ve had to come to the forum about help with buttons a few times. There are some wise souls here. The best bit of advice I can give you is to take good clear photos of each button, front and especially the backs. Back marks are almost always the key to correct identification.  Good luck!  mikie

A 61 with an apostrophe after it means 1961.

Just how BIG is your garage 😁?

If you want to learn about the four, custom-made pistols carried by the Sergeants of the Guard at the Tomb, this link will give you the answer.   https://soldiersystems.net/2018/10/13/tomb-of-the-unknowns-guards-begin-use-of-custom-m17-pistols/   There are only four of these that Sig Sauer has made, so you will never see one on the commercial market.

Extra cleats you mean?  The number here is typical for these old pattern leggings. Whats actually neat about them is the brown color - same as the 1890's type. Not at all common for the WW1 period.