Very excited about these. Another item I do not recall seeing on sale before now. I bought these from a seller in the USA. He bought them at L’Atelier Renault, Paris in 1995 whilst visiting. The plastic case being held together by two elastic bands but one of them has perished, it’s only 24 years old!!
I did buy a pen back in the late 90s when I visited, just need to find it!