Error Planchet | Invisible strike?

[Roller]

Not anything like featured on error ref but as you can see the rim is, at least partially, formed on both sides. How could that happen without a strike? Open to all comments.

[grnwavdav]

I am wanting to say that it is just from the upsetting mill. I think it is just a type II unstruck planchet. Still a cool find though.

[enamel7]

I agree with Dave.

[Roller]

The proto rim should be on the outer edge (perimeter) of the planchet. The partial rim here is inside that edge.

[mikediamond]

All I see is a somewhat atypical planchet. The proto-rim varies in height and how sharply defined it is. The highest point on the proto-rim will also vary in position, depending on the strength of the upset and the cross-sectional profile of the grooves in the upsetting mill.

[jfines69]

OK... I am lost... There does appear to be a proto-rim and a partially formed rim from a strike??? It also appears to have been a slightly off center strike??? Is this a plated planchet (There appears to be linear plating bubbles on both sides)???

[Roller]

It is a 2.5g planchet. What I don't get is how the up-set mill can produce a rim with the inside perimeter squared.

[onecent1909]

OK I agree with Mr. Diamond.
This is just a type 2 unstuck planchette

in a coin press a cent die has a base that is bigger than a cent in diameter, a shank, and a die face which is the same diameter as the face of a cent
it also has a collar that keeps the diameter of the cent at a constant number.
for this to be what is asked about, the feeder finger would drop the planchette onto the press without any dies, the hammer would drop down on a old press there would be nothing touching as it would be to far away from the anvil, and the planchette would be ejected untouched .

you can not get a real rim from a strike without the pressure of a die, the die would leave some mark.
when the coin is struck by the dies and is ejected there are ejection marks on the edge of the coin. they should be up and down and parallel with each other.
they should not be intersecting.
does your coin have ejection marks?

those are not planting bubbles. They look to me like the marks left from the rollers rolling the mental to the proper thickness

trying to be funny...
Rims are not squared they are round.

[mikediamond]

The proto-rim is unquestionably sharper on one side. However I'd chalk this up to normal variability. In any event, this can't be an invisible strike because such errors are always associated with a struck-through error, a partial brockage, or an indent.

[Roller]

OK I agree with Mr. Diamond.
This is just a type 2 unstuck planchette

in a coin press a cent die has a base that is bigger than a cent in diameter, a shank, and a die face which is the same diameter as the face of a cent
it also has a collar that keeps the diameter of the cent at a constant number.
for this to be what is asked about, the feeder finger would drop the planchette onto the press without any dies, the hammer would drop down on a old press there would be nothing touching as it would be to far away from the anvil, and the planchette would be ejected untouched .

you can not get a real rim from a strike without the pressure of a die, the die would leave some mark.
when the coin is struck by the dies and is ejected there are ejection marks on the edge of the coin. they should be up and down and parallel with each other.
they should not be intersecting.
does your coin have ejection marks?

those are not planting bubbles. They look to me like the marks left from the rollers rolling the mental to the proper thickness

trying to be funny...
Rims are not squared they are round.

I guess you did not watch enough Flintstones (rims are round), LOL. Reading your response John, I realized my obvious mistake in diagnosis. I pretty well understand the process from blank to coin and I failed to note that the rim, being higher from the plane than the design elements, would not be formed without some trace of the design being present. (I'm still puzzled by the squared inner perimeter though.)

[jfines69]

I appreciate the follow up... Thanks everyone... I think I got it now!!!

[mikediamond]

I should note that in state quarters, owing to their flat die faces, you CAN get a weak strike that shows nothing but the design rim. It requires that the planchet have a rather tall proto-rim and that minimum die clearance be slightly smaller than the distance between the apices of the obverse and reverse proto-rims. The design rim will be low, weak and just as wide as a normal design rim. It will not be narrow and sharp.