This stereoview card captures a fascinating moment in military history with a French 155 mm gun aimed at the German trenches during World War I. The black and white image provides a vintage glimpse into the past, and the card is marked with the number "18651" and the publisher Keystone.

The theme of this card is military history, specifically related to World War I. The card falls under the category of collectibles and photographic images, specifically stereoviews and stereoscopes. It is a great addition to any collection and provides a unique perspective on a significant moment in history.