1914 $5. Strange Line. Any Ideas?

Solved it. Put it under my daughters microscope at 40x and determined it was just a long, thin and shallow groove, but not the usual sharp scratch. Under glass at 10x was just not enough for my eyes. Sorry about posting it, but this grading process is intriguing me. Any opinions of the grading?

How can it be a die crack if the legends are not
effected? The groove is under the legends--Therefore a planchet error?

Doubling? Curous - where do you see that?

Hmmm - the groove/die crack on my 1914 $5 is identical to the one running through the D:G on your 42 50 cent piece. I wonder how that happens to the planchet in the manufacturing process?

With the $5, if it is a die crack, it should show up as tiny raised ridge, not a groove.

If there was a scratch, groove or crack in the die, it would show up in relief (raised) on the coin.
If there is a ridge on the die, (most probably part of the design, or less probably damage to the master die), it would show up as a valley or dull scratch on the coin (incuse).

To give a little better idea of the coining process:

1. A master die is prepared from the original artwork (this die is incuse, i.e. detail is below the field areas on the die face)
2. Hubs are prepared from the master die (these hubs are in relief, i.e detail is raised above the field areas on the hub face) The hub looks like a coin, in this case, without the final date numeral.
3. Working dies are prepared from each hub (detail incuse on the die face)
4. Coins are struck from the working dies.(detail in relief on the coin).

With a total of 295,638 $5 coins having been struck, probably only 12 or so working dies would have been used. Dates would have been cut into each working die. Perhaps no more than three '191' hubs would have been required.

I stand to correct myself a bit.
If there is a shallow but dull VALLEY on the coin, there must have been a RIDGE on the working die, that would have been caused a partial crack failure on one of the hubs. Metal under striking pressure would have easily flowed any small crack detail in the lettering detail made by the hub. The lettering would appear unaffected.

I feel sure that a scratch on the planchet would have been obliterated by the the die strike, unless the planchet damage would have been especially grievous.

If I am right, I wonder how soon the hub was withdrawn, and how many $5 coins similar to yours exist?
That raises the possibility that you coin may be an interesting die variety.

My premium select has the same.