Source: https://archive.org/details/1950-advertisement-for-keefer-goldtone-pencils From the 4 November 1950 edition of Australian Women's Weekly.
It is quite a surprise for me to see mechanical pencil is marketed as luxury product.
If only girl gift me a mechanical pencil on my date :D we'll see, we can write letter to each other, instead of texting.
I found another ads about this Keefer Goldtone Pencils. https://nla.gov.au/nla.obj-550354064/view?sectionId=nla.obj-552663332&partId=nla.obj-550370917#page/n25/mode/1up