Thanks Alex,
Thinking about it , they could be for the Aust. type log books . I used to have some of them for the Aust. bren carrier and the Harley M/Cycle .
Hudsons stores in Melbourne used to sell them as note books for 50 cents each ! Back in the 1970's , I bought a few , but they have dissapeared over the years .
They would fit in that holder OK .
Hudson stores was like going back 50 years .... it was a mail order / hardware store since the 1930's . They purchased a lot of surplus stuff just after WW2 . The owners were two old eccentric brothers , the place was just hanging on in the mid 70's . It's long gone now , demolished . To buy anything , you had to negotiate and haggle a price for ages .