Need help identifying this Eisenhower dollar error

My take is that in a struck thru, the entire piece needed to be pressed into the planchet for the rest of the obverse to be struck up by the die.

However, on your coin, it seems the rounded effect also affects the edges of of the struck up numbers. But, a struck thru would need to have been fully embedded in the coin, especially if it was hard enough (metal) to have left those lines in the trough.

ttt

@FredWeinberg said:
IMO, if those cuts were on the planchet before the coin was struck, you would’ve expected to see some “ghost like” image of the digit inside of the canyon area - and all we see is flat thin parallel lines inside the Grooves,With no hint of the digit

How would there be any indication of a digit in an area that didn't have material when struck? -Strike-through, yes, but not if there was nothing there to begin with.
How does one explain the weakness on the reverse that is exactly opposite the grooves? It's slight but definitely there, and those are the only letters showing weakness.
We can see in the lower groove where material was pushed into it- that material appears to be level with the fields. This could only happen from being struck with a groove in the planchet.
If this was cut by a rotary tool like many are saying, there would be rough burrs on the edges of the cut. Besides that, there is no way to cut with a tool like that right up to the edge of an internal feature- the rim.
I'm sorry I have to disagree with the experts here, but I can't see this as anything other than groove in the planchet before striking- an error coin.

That is how I see it and I feel strongly about this.

@joeykoins said:
Maybe it was the same guy that started this, but decided to ditch it and move on?

To make a cut out coin you start by drilling a hole, then put the coping saw blade through it.

If the deep grooves were on the blank/planchet before it was struck,
the striking pressure would 'soften' the texture inside the groove -
instead, we see fine parallel lines inside. And, the striking pressure
would deform the grooves, at least to an extent that would be noticeable,
and I believe that you would also see some 'ghosting' of the digits inside
the grooves.

The Upset Mill operation would have also covered the rim area, below
and just to the right of the '1'. Notice that one groove ends before the
rim, and the other goes over the rims at both ends.

The rims at each end of the top first, or larger indented areas would not
exist if they were there before the planchet was struck.

And as far as there being something ON the planchet when it was struck,
those areas do not have a struck thru anything look for that thickness and
depth, imo.

Just my opinion, but I don't see this as an error - but I'm ready to stand
corrected.