There is a Knightsbridge decanter with an eagle for sale on line now. They describe it as etched, although it looks to me to be cut rather than etched.
It is 9 7/8″ (including the stopper) X 3 1/2.”
It is numbered 120/300 and signed by the artist, F. Stowek. I don’t believe these to have much age. No older than late 80s early 90s. The company doesn’t appear to still be around, unless perhaps it was a subsidiary of another company. The asking price on the decanter above is less than $200 including shipping – and it is still for sale.