✅ SOLVED What is this numbered metal disk?

[PenguinDetectsCA]

Hi. Found this in a 1960s friend's property. The place did have fig farming activity dating back to the earlier 1900s.

Appears to be copper, What is it?

 

[russau]

I would guess it's a (indicator) part of some metering device .

 

[RedLeaf]

only thing that comes to mind is possibly a survey marker disc

 

[Digger54]

Agree with Russau, likely a part of some sort of spraying equipment.

 

[Trezurehunter]

I can't help, but it's an interesting piece.