This is a series of cards that have the appearance of sepia photographs, but were actually printed by halftone and a glaze applied.
Series Contents: I have seen only a few cards of this type, so the number in the series is unknown. They all have negative numbers in the 300,000 range.
Date Published: The earliest postmark date I have seen is 12 January 1910.
Printing: These were printed by halftone, using a slightly brown ink, rather than the usual black. They are very glossy giving them a photographic appearance, so a glaze must have been applied after printing.
Identification: On the back the attribution is “The Valentine & Sons Publishing Co., Ltd., Melbourne and Sydney”. The cards were produced after Valentines had set up an Australian Branch, operating from Melbourne and Sydney.