An electrotype plate of the ½d value was produced in 1915 and a steel plate in 1924. The booklets contained both ½d and 1d stamps. The 1d stamps were initially the Penny Dominion which were replaced in 1928 by the penny Field Marshall.
There were two booklet plates. The first was made from electrotypes at the Government Printing Office in Wellington in 1915 while the second was a steel plate produced by Perkins Bacon in 1924. Both plates had the same layout of 144 arranged in panes of six.
There were selvedge bars in the margins of each pane.
Stamps from the electrotype plate were printed on De La Rue paper while those from the steel plate first appeared on Jones paper.
In 1925, stamps appeared on Cowan paper with adverts in
the side selvedge.
Booklets containing 1d Field Marshall stamps were first issued in 1928 and were perf 14. There were on Cowan paper and exist both with and without adverts in the selvedge.
Parisian Tie adverts were on the left and right
selvedges while Jeyes adverts were on the binding.
In 1934, booklet stamps were issued perf 14 x 15
and had Parisian Tie adverts.
The above information is taken from The Postage Stamps of New Zealand Vol 1, published by the Royal Philatelic Society of New Zealand in 1938. All scans were made by the author.