Philippines 5c 1917-S Blank Obverse

Im not sure that this coin is gradeable ,, Its been my experiance that its impossible to have a one sided blank coin that is a struck error, its almost certianly damage and that being the case the coin would not be gradeable .

Is it even an error? Looks like the one side has been filed down a bit. Any way to post a higher detailed pic/scan? Do you have a way to weigh it?

with Metalman. There are a few errors that can obscure one side of the coin, but nothing will produce a flat, rimless obverse or reverse. I think that one side of the coin was ground off after minting and cannot be given a grade. If this is a 1917-S 5c, then US minting standards apply

In respect to Augbauer's coin, I think the photo above provides some good clues as to what happened to this coin
Prior to a coin's striking, the blank planchet was run through an upsetting mill, which forms a raised rim equally on both sides.
When the coin is struck, the pressure pushes coin metal against the die collar, further reinforcing the edge. Even if some kind of strike error produced a blank side, there would be evidence of a rim. As it is, the coin above has a normally struck rim on one side, while the opposite is missing both the design and raised rim. It's far more plausible to conclude one side was ground off. It was a common practice during this time as coins were often engraved on one side as mementos. I enlarged the blank side to see if I could see signs of engraving, but I do see marks that suggest a physical process used to remove the design and rim:

You're welcome Augbauer--I'm imperfect, but I do try to be helpful.