Small Lamination?

Events happen commonly on some years dies. The over use of the 50's Wheat cent dies show the same thing over and over.

The weakening of the outsides of the devices towards the rim.
The die cracks on the head.
The die cracks on the wheat ears.
The die chips on the wheat lines and grains.
Retain Cuds on the reverse.
The die chip on the wheat "T" on CENT.
The Die Deterioration on the Zincolns obverses.
The die chips on the 12th column on the memorial cents.
The die cracks on the tops of the shield cents.
Damaged punches on the mint marks.
Coin wear and flattening on the circulated wheat cents.
Knowing the master die doubling on certain years of cents.
Know what the design that is passed on from the master die to the hubs on certain years/decades also helps.
What to look for on error coins to ID them.
What is common die wear on coins struck with advanced age of dies.

All these happen over and over so I remember these as a "heads up" when searching coins.