Other perforations
Other Hradčany perforations include less common, mixed or irregular perforation types not classified in the main groups.
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Other Hradčany perforations cover rare and atypical perforation variants.
Non-standard perforation types
This category includes mixed perforations, production anomalies, and unusual variants.
- mixed and irregular perforations
- production anomalies
- specialized identification
- advanced collector focus
A challenging but rewarding area of study.



