PDM CDX - 1990 - EU - ICM VERSION
PDM stands for Philips-DuPont Media.
Philips, who created the compact cassette and DuPont who created chemicals like Nylon and Teflon...and the first CrO2 for cassette use.
But these particular cassettes are made by ICM in Switzerland.
Superb PURE CHROME Type II, it's just being an EU only cassette combined with their rarity means that you'd be better off spending less if you actually want a cassette to record on.
But if you just love the looks, then these won't disappoint sonically.
PDM CDX - 1990 - EU - ICM Version