a flat button?

[castletonking]

I believe this is a flat button,based on the unfortunately broken shank on the back.it is in such bad shape due to i believe the fact it was found in a farm field that for years has used fertilizer.The house and property date back to 1750.any ideas on if it really is a flat button? it is very thin.,thanks for any info you might provide,I am very curious

 

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[timekiller]

It's a dandy button.It would date late 1700's.
Take Care,
Pete,

 

[castletonking]

It's a dandy button.It would date late 1700's.
Take Care,
Pete,

holy cow!!!! nice