New Lynn trench clay article

http://www.aucklandtrains.co.nz/2009/10/18/new-kiwi-icon-new-lynn-rail-trench-pottery/

I would have liked to try some of this famous clay ..... alas I didn't know about this event until too late!

Woop woop ..... I was given a bag of this clay to experiment with.
I've seen the clay bisque fired and it fires a warm very light terracotta colour.

My thoughts are that this was the original clay that was used for the Army bowls and early ware.
It was described as a straw or putty colour and was used for the first railway cups as well as tableware.
I think this was available to potters to purchase for many years under the name Crum Clay?