How A Telephone Works Siemens Brothers - c.1950 2-Part Cutting / Print

If the year of publication is known it will be shown in the title.

The squares behind the image are in centimetres, and should give you an idea of the size of the item.
 
Unrelated content is present on the reverse.
This item is over 70 years old and may show light signs of age and use.
The watermark will not be on the actual item.
The item will be sent flat and unfolded in a cellophane pocket and boarded envelope

No offers please.