Wedgwood Black Basalt Vase

I've Had this Wedgwood Black Basalt Vase for ages, but never really used it, until I realised that the Lilac would look stunning in it? It has a classical ribbed shape, and I think the marks mean it was made in 1962. I was puzzled that there was no England mark, so I had another look, and there is a very faint printed circular mark see last picture!