Large salt glazed vase

I have this vase, which has unfortunately been seriously damaged (and repaired), currently residing in the garden. It's obviously by an accomplished potter, though I do not recognise the mark. I have photographed it both ways up as I'm not sure which is correct.

Could it be Chester Nealie's early mark - the O with the slash through it but with a bit too much clay left in one corner? I'm not sure it is, but its all I can think of.

These mugs just popped up on TradeMe with an identical mark, will watch with interest!

http://www.trademe.co.nz/pottery-glass/porcelain-pottery/other-nz-manufacturers/auction-877113179.htm