Azzardato: qualcuno conosce questa marca di biancheria intima?

Got this years and years ago from my grandma.

It’s still holding up perfectly and fits comfortably. Much better than the junk being sold in clothing stores today – after 2 years you get holes.

Does anyone know what this brand is? The letters are wearing out and I’d love to buy some more. It’s a trunk (boxershort korte pijp) and a very flexible fabric.