Antiques: Hearing Aid Worth a Listen

Q. This device belonged to my grandmother, born in Yorkshire during the latter part of the 19th century. She became deaf as a child after suffering from scarlet fever.
My father was a medical doctor and actually used this ‘ear trumpet’ for some of his patients who were hard of hearing! It’s a very straightforward instrument –the speaker talks into one end while the listener positions the narrow end into their ear.
On it is printed ‘Mr. A.D. Bateman’s Tube Reg.