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It is not a RIDB.
Retained Interior Die Break is retained... the part of the die that has broken off is still there...
so on a RIDB the area will be left with what you would normally see on a coin...
you will see the design that would normally be there
but most of the time the broken area is raised up or lower than normal as it is no longer attached to the die
and may shift up or down..
yours is a die break, some may call it a IDB as it happens in the interior of a die and not on the edge (a CUD) or collar (a collar break)
Nice find... Remember an IDB is an Interior Die Break only and produces the big chunk you see because the piece actually fell out of the die... A CUD is always a break attached to the rim area because a crack started at one area of the rim then came back to another area of the rim and the piece fell out of the die... Hope that helps a little... All the different terms can blow the mind away
Jim (A.K.A. Elmer Fudd) Be verwy verwy quiet... I'm hunting coins!!! Good Hunting!!!
Yep.. JFINES is right a CUD is on an edge of a coin..
A cud always touches the rim
IDB (I just say die break) is in the interior.. not touching the rim
Member: Florida State representative for the ANA, Florida state representative for CONECA, F.U.N. and the Ocala Coin Club
think of a die as a piece of metal.
a die break or a IDB would be if part of that piece of metal broke and fell out
a RIDB or retained interior die break would be if part of that piece of metal broke but did not fall out
a cud would be if part of that piece of metal broke at the edge of the die and it fell out
Member: Florida State representative for the ANA, Florida state representative for CONECA, F.U.N. and the Ocala Coin Club
Great thank you John! Now I'll have some egg nog! The embarrassing thing for me is I have found both RIDB and IDB's and they are listed on BJ's website, but I have never fully understood about them. I think I've got it now.
Great thank you John! Now I'll have some egg nog! The embarrassing thing for me is I have found both RIDB and IDB's and they are listed on BJ's website, but I have never fully understood about them. I think I've got it now.
It can take a while to get everything down correctly... Your 84 appears to be a RIDB because there appears to be some shift (Movement) of the break... That means it has completely broken loose of the die but has not fallen out yet... When it falls out then you get the big blob or IDB... Hope that helps!!!
Jim (A.K.A. Elmer Fudd) Be verwy verwy quiet... I'm hunting coins!!! Good Hunting!!!
Interior Die Break: This is simply a very large die chip. Unfortunately, qualifying a die chip to be an interior die break can be confusing, since different experts list differing size parameters for qualification. Please visit cuds-on-coins.com for listings of interior die breaks. Image donated by copperlover.
Retained Interior Die Break: This is an interior die break that hasn’t completely fallen out of the die. Since the piece hasn’t fallen completely out, some design elements may still be seen in the area on the coins it strikes, even though there may be lateral or elevation shifts. Please visit cuds-on-coins.com for listings of retained interior die breaks. Photos donated by Bella.
Cud: A rim to rim die break, resulting in a piece of the die breaking off and falling out. The coins struck by such a die will exhibit a “blob” of raised metal along the rim where the normal design element should be. Cuds are always connected to the rim, else they are called interior die breaks. Due to the missing chunk in the die, the opposite side of the coin will exhibit a weakly struck area as shown in the 2nd photo below. Please visit cuds-on-coins.com for cud listings and attributions.
Retained Cud: This is a rim-to-rim die break that hasn’t completely fallen out of the die. There is usually some lateral or vertical shifting of the broken piece, which will show on the coins it strikes, although the design will be largely intact in that broken area on the coin itself. Please visit cuds-on-coins.com to see listings for retained cuds.
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but it has a nice IDB or RIDB in a very odd location!
Be verwy verwy quiet... I'm hunting coins!!! 
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