Heydays Antiques has dated this piece to the 1890s.
A.W. Gamage Ltd was a department Store at 116-128 Holborn in London established in 1871. It eventually closed in 1972.

Altitude Readings 0-8000 feet.
Barometer 2in or 5cm diameter and 1.5cm deep
Case 2.3in or 6cm and 3cm deep
Please email or call Robert on 07899058752 to Arrange Viewing or Discuss Shipping.
Heydays Antiques has dated this piece to the 1890s.
Specialising in personal attention for 17/18/19th c traditional longcase clocks & early 20th c triple weight quarter chiming musical clocks
You can view the stock and full dealer information on the Heydays Antiques Profile Page