This is a series of b&w cards, probably printed by J. Walch & Sons themselves at their printery in Hobart.  I have seen only one printing, with has a brown back.

Series Contents: The full list of cards in the series is not know; the ones I have seen are illustrated here.

Date Published: Published in 1905. The earliest postmark date I have seen is 9 Oct 1905.   

Printing: The cards were printed by letterpress halftone. J. Walch & Sons had had this type of printing press in their own print shop in Hobart since 1900, so it is most likely that the cards  were printed there.

Number in Series: Unknown.

Identification:  The printers imprint on the back left margin is:

Series E.-1905

J. Walch & Sons, Wellington Bridge, Hobart