It changed back to Horch House after being Entertape for awhile. Now the company seems to be defunct. They moved from Austria to France (or maybe it was Brussels, Belgium) last I heard.
I'd love to get their Bert Kaempfert tape 7 1/2 IPS NAB.
That dark gray tape is 3M 177. It's fine unless it gets subjected to harsh environmental conditions, like being stored in a non-climate-controlled storage unit, car trunks, sheds or garages.
By the way does anyone have a Stereotape catalog from around 1972 or so? I threw mine out years ago but...