All Tiger Cat varieties are from the 2nd Master Plate. The varieties are on both ordinary and Helecon papers as the same plates were applied to both paper types.
The enlargements displayed here have been photographed by a microscope giving a very high definition of the design, allowing the philatelist to identify any of the listed varieties.
Of course there are other varieties (flaws), when I find them, they will be uploaded. Most of the varieties shown are listed in the Queen Elizabeth II 1952-1966 ACSC 2019, others are unlisted; those listed can also be read from previous issues of the ACSC (Australian Commonwealth Specialists' Catalogue).