shape 761

Ev.. In the musuem notes, I can't find this number ... Can you clue me in as to where I would find it? Just wondering about the height sizes for the set.

Today I got a 761/03 which measures 175 mm , which looks the same as Jonno's photo below.

I have a smaller version that measures  105mm but that does not have the number on the base ( or if it has I can't read it) so would that be the 761/0 or 761/1 - would you or anyone know?

I see in the gallery we have two sizes listed so there must be a set of at least 4  

Here is the topic about the 761 jug Janice.  
I got the shape from a photo of old shapes from somewhere ....?
As is often the case now my photos don't show, but I've reloaded what we had in the Gallery for you.

https://www.newzealandpottery.net/t2295-jonno-s-possible-761-jug#6645

Awesome, so now I need to find the 2 middle sized ones and then I have a set!!

These are my 2 shape 761 jugs, just need to find 2 more then I have a set !