Four more buttons found. One with the letters GCT. Ids please

[woolwich01]

Last night I found these after a short hunt. I have found a couple of hundred buttons here. The one with the GCT on it is a first. Any ideas what it means?

Thanks

 

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[West Jersey Detecting]

Grand Central Terminal Railroad button. Looking at the shank would indicate pre-1950's, but later than 1920's.

 

[RVRoamer74]

Some nice button saves. The GCT is a nice bit of history. Congrats at it all.

 

[Digger RJ]

Nice!!! Congrats!!!

 

[Professor of Engineering]

Nice finds, congrats!

 

[A2coins]

Awesome finds love railroad relics that's really cool. Well done. Tommy

 

[Inspector]

Nice button saves, like the RR Button, congratulations & nice ID to NiWJ