Neffy...I was thinking the same thing as you but not sure. Maybe one of three piano foot pedals based on its offset. Did a couple of searches for it and didn't turn anything up. It's got to be some sort of pedal with that rocker shape.
Pedal for sure but as to what it is from, I have no clue. Because the heart faces towards you normally I think it is mounted reverse of what most think. Maybe a hand made PTO engage pedal from a farm tractor. The one beneath the heel of your foot in front of the seat.
While none are exactly like your item. There is one step that pivots out of the way and one with a heart on it.
It could also be a foot release latch for machinery of some sort.
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