For those interested in flaws on Australian KGV stamps, Volume 1, Electros 1-12 (2018)
and Volume 2, Electros 13-29 (2019)
of Bill Fiora's comprehensive plating guides for the KGV Die I Three Halfpence are available for purchase at Fair Dinkum Stamps by clicking either of these links:Volume 1, Electros 1-12Volume 2, Electros 13-29
Illustrated with 1000's of diagrams, these Guides incorporate all known research for these stamps to date.
Each document has comprehensive information as to how to go about plating a stamp.
Essentially, they lay out the known flaws in a pattern which enables the stamps to be readily identified by electro and plate position.
Where multiple copies of a cliche have been identified but plate position has not yet been identified, they have been assigned as Unlocated Constant Varieties (UCV's).
3rd Edition, 186 A4 pages, spiral bound, plastic front cover, leather-look cardboard back cover. Also available unbound.