Potters Marks! Help Please

These are very well made pots. I would appreciate help in identifying the potters. I can't seem to find a fit in the gallery or on the Potters Site.
At least we know the next one comes from Nelson! It's quite tiny.

We have puzzled over that second mark before, but no info yet, see this link
http://newzealandpottery.forumotion.net/t3029-wee-lamp-anyone-recognise-the-mark-nelson-potter#9409

WOW! That's wonderful.
Mine had a pipecleaner in it as well. And a cork in the filling hole.
There must be someone in Nelson who would know.

Now, someone must recognise the top mark. Probably South Island. I've seen quite a few pots with this mark around Christchurch.
Maybe I'm looking at it upside down!

A EUREKA moment! I found another one of these pots in the first post today and looked at the mark on a 90o angle. It's not M it's B underlined.



It was so obvious on the one I saw today.