This is one of the oddest survey marker designs I have come across. A sort of half dome with a groove or slot cut into it. Painted bluey-green. Set in concrete. At the corner of Milne Rd and McIntyre Rd , Modbury North. Right in the middle of the grass outside a church, well off the roadside, so it's D 2 T 1.5, MF 1. Took a while to get the lid off this one!
Also found a couple of weeks back but logging today.