Need help on a G.G button i dug in the park today

[Pipster]

popped a wheat and this guy today i don't know much about buttons so i am turning it over to yall
i only found a replica site "the waterbury button company" but they don't say what the button was originally
made for

i am turning to you guys on this one

front G.G
back looks like D _ _ _ _ N co.

thanks for your help in advance

 

[trapperart]

No help with ID but congrats on a nice button