Oldest M&S dressing gown?

I got a lot of wear out of a black cashmere jumper belonging to my great grandmother. It must have been 80 years old. I wonder if good quality cashmere bought today would last as long? It's a luxury fibre but it's eventual cost per wear must be fractions of pence if it lasts so well.
I've got an M&S cashmere jumper but it's very thin and has rubbed badly. Not great quality.

Jane ?

Goodness I'm well topped! I wonder will the things we purchase now still be wearable in thirty years.

Mumofmadboys possibly but one d/gown I bought two years ago got scruffy and faded very quickly.

I bought a dressing gown when I was pregnant with our eldest 33 years ago. It's a summer one and I've worn it ever since each summer. Dressing gowns don't seem to wear out easily!

I have the M & S nightie that I wore when I had my 3 DDs. The first in 1978. Never wear it but can’t bring myself to get rid of it.

I've still got the M&S pants I 'sat' my A levels in in 1972! Needless to say they don't fit very well any more - not due to them shrinking! I don't wear them but can't bring myself to throw them out. They are in fine condition. Built to last.

Even better!
I've also got a cotton nightie from 1997 same label.

Yes, I have a navy silky type one from 1992. I still wear it even though I have two more.