Keeler Wide Angle Ophthalmoscope 1933
According to the Keeler website, the company managed by Charles H. Keeler launched the Keeler Wide Angle Ophtlamoscope in 1933.
This model comes in a leatherette box, with a spare bulb. Its handle opens to contain two “D” size batteries for power. It is signed London W.1. and says WIDE ANGLE on the front. On the back it has the model as K1229.
Its power range choices are from -20 diopters to +20 diopters.
The underside of the box is labeled in gold print:
47. WIGMORE STREET, W.1.
MADE IN ENGLAND”
There is a woodcutting image of this factory from the Keeler USA website in the images.