copied from
Phisick.com:
The earlier oval cartouche on the (London) dome reads simply F C Rein Inventor 108 Strand and dates the trumpet to circa 1860.
The cartouche reads Down Bros Makers London dating the piece from 1874
Maw and Sons were registered in 1860 and Maw Son & Sons in 1901
Arnold & Sons Surgical instrument manufacturers Giltspur Street, London .
According to Bennion they were in business from 1866.
T Hawksley Ltd., James St., Oxford St., London W1. This firm was established in 1869.
W. H. Bailey and Son. 45 Oxford St., London - at the base of the stem ‘English made’.
They traded in 38 Oxford St from 1894.
Max Wocher & Son Co were based in Cincinnati Ohio from 1897 to 1900.
Audiscope Pat Pend. Amer. Earphone. Co. N.Y. This company made non electronic hearing aids in the 1920s