Keefer Goldtone pencils - 1950 ( discuss.online )
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.