That shoe shows very little wear...
Could be a drop, or not used because it was a hard fit. (open healed shoes are usually shaped to fit a horses hoof either by spreading to narrowing the shoe).
A bar shoe with the staggered bar permits it to be opened or closed to a minor degree.
Maybe a front shoe and it's heal (shoe extended beyond hoof) that was clipped by a rear hoof, or simply sucked off by mud...
My opinion, really looks like an off-the-shelf shoe as opposed to being ferrier forged. The reason is that a ferrier would have shape-fitted the shoe first then add a straight bar.
I'd say that the shoe is early 20th century and Plus the barred shoes weren't manufactured until the mid 20's.