Not a spectacular cover below, but as suggested by many members of our stamp community here... why not research who the addressee is?
I did and Fred Lowenhagen had a busy life as a civil engineer in lovely Fruita, Colorado
(see obit below, including info about his father losing his life in the civil war).
And what I found even more interesting was that his mother, Sophia, was the Postmistress in New Holstein, Wisconsin for 24 years.
Details below and a link to a picture: http://www.2manitowoc.com/04/glas0172.html
With the death of Mrs. Sophia Loewenhagen, which occurred at one o'clock on Wednesday,
another old settler passed away. The deceased was born in Germany 71 years ago and
some fifty years ago she came to New Holstein. She kept house for her brother a few
years and then was married to Lorenz Loewenhagen and lived on a farm 2 1/2 miles west
of the village. In 1862 her husband enlisted in the army and died in a hospital in
Georgia. Mrs. L. was appointed postmistress of the village and held the position for
some 24 years. She was a woman whom everyone liked because of her kind disposition.
The funeral will be held Saturday afternoon.
Chilton Times, February 26, 1905http://www.2manitowoc.com/04/glas0172.html
Fred Lowenhagen Chilton Times May 12, 1928
On the morning of May 4th, O. H. Luehrs of New Holstein, received a message conveying the sad news of the death of Fred Lowenhagen, who passed to the Great Beyond at his home at Fruita, Colorado, that morning. The deceased was a son of the late Lorenz and Sophia Lowenhagen and was born on a farm two miles west of the city of New Holstein on Feb. 20, 1862. On August 22nd of the same year his father, Lorenz Lowenhagen answered the call of his adopted country and enlisted in Company E of the Twenty-first Wisconsin regiment. He took part in the battle of Perryville and Sherman's campaign at Atlanta and there he gave his life in defense of the flag on July 12, 1864. He left a widow and two small children in sad circumstances. At the age of eleven Fred was taken to Milwaukee, by a sister of his mother, where he received an education as civil engineer and during the early eighties helped survey for a railroad in the state of Iowa. In 1885 he answered the call of the silver mines in Colorado. During the centennial exposition in Chicago in 1893 he made his trip east and also visited his mother, who at that time was a postmistress at New Holstein, a position she held for twenty-four years. Fred was a staunch advocate of the free coinage of silver at the ration of 16 to 1 and with Bryan's defeat lost heavily.
He was married to Miss Lucy Veers in 1895. Miss Veers was a graduate of the Oshkosh Normal and at that time was well and favorably known among the teachers of Calumet County. Mr. Lowenhagen was recognized as a high type of citizen and the notice of his death was received with the deepest regret by all who knew him. He leaves to mourn his death, his widow, four daughters and three sons, Mrs. Claude Coulter of Rifle, Colo., Mrs. Fred Stuart and Lawrence Jr., of Pittsburg, Calif., Marion, Fred Jr. and Teddy at home. He also leaves one sister, Mrs. O. H. Luehrs of New Holstein. The funeral was conducted under the auspices of the Masonic order, of which he was a leading member.