Groton Monument - Groton, Connecticut

This undivided back postcard was published by the Hugh C. Leighton Company in Portland, Maine. Printed in Germany most likely between 1901 and 1907..

The Groton Monument, sometimes called the Fort Griswold Monument, is a granite monument in Groton, Connecticut. It is dedicated to the defenders who fell during the Battle of Groton Heights on September 6, 1781. 

The Battle of Groton Heights (also known as the Battle of Fort Griswold, and occasionally called the Fort Griswold massacre) was a battle of the American Revolutionary War fought on September 6, 1781, between a small Connecticut militia force led by Lieutenant Colonel William Ledyard and the more numerous British forces led by Brigadier General Benedict Arnold and Lieutenant Colonel Edmund Eyre.

S.S. North American - The Georgian Bay Line - Chicago

SS North American was a Great Lakes steamboat built by the Great Lakes Engineering Works at Ecorse, Michigan in 1913 for the Chicago, Duluth & Georgian Bay Transit Company. The vessel was launched on January 16, 1913 and was the oldest of two sister ships, the newer one being the SS South American.

While the North American was on the North Atlantic being towed to Piney Point, she unexpectedly sank on September 4, 1967. The location was 25 miles (40 km) northeast from Nantucket Light, where the bottom is at 400 feet (120 m). The wreck still remains at this location.

I suspect that this unused chrome postcard is from the late 50's, early 60's. 

Winona Assembly and Summer School - Winona, Indiana

In 1894 The Presbyterian Church of Indiana purchased the land, a transaction that was negotiated by Solomon C. Dickey. He would become an honored figure in Winona Lake. Dickey established the Winona Assembly and Summer School in 1895. 1915 brought a significant setback: financial ruin. Due in part to losses in railroad revenue, the Assembly was forced to declare bankruptcy.