I have been studying the bronze series for a few years under the microscope and would ask if anyone else has one of the the following in their collection:
1879 REV J penny large metal addition above the lighthouse.
No sign of compression or metal distortion. Additional observation in subsequent examples of the 1879 penny show a raised mound and removal scars matching the form of the metal found on specimen A. The metal is at its highest 1 mm off the surface rises in the middle. defined edge and coincidentally seems to match reverse H lighthouse top. It is an intriguing metal addition and I would ask if anyone has any evidence in 1879 pennies of anything similar. In 3D visualisation of the anomaly there is no strike to any of the metal in the vicinity which could cause a ripple in the metal. Note that the metals medial apex would shift anything slightly to the left of the present light house REV J all other features so far remain the same for this die type, although I have to look in more detail.