How A Gyro Gyroscope Compass Works - c.1950s Book Print

A cutting or print from a disbound vintage or antique publication.  It is not a photocopy or modern reproduction.

Year of publication, if known,  will be shown in title.

The darker 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.
The cutting is over 70 years old and may show signs of age and use.
The watermark will not be on the actual item.
The item will be sent flat and unfolded in cellophane and a strong boarded envelope.

No offers please.  Thank you for looking!