Water Mark On Australian Stamp

Dear All
I have inherited a very old stamp book with items from all over the world and areas titled 'The British colonies' which is really interesting as its places such as 'Ceylon'. I am curious about one Australian stamp which appears to maybe rare if there the watermark is unique (printed sideways). However, I can not locate it and would anyone else have any knowledge of this stamp. I have only had the book for a few days and it is very interesting and drawing me into research and a new hobby. Here is a photo and also if anyone wants images of any stamps that are included from other countries then let me know as there are loads! (such as the Danubian Steam Navigation Company!
Thanks
Darren

Hi Darren,

We will need to see the back of the stamp to see the watermark.

Likewise, we would need to see a picture of the Danubian Steam Navigation Company stamps to see if they are genuine.