Description on back of card: THE BLUE HOLE, CASTALIA, OHIO. Six miles west of Sandusky, Ohio, on Route 101. The depth of the Blue Hole is unknown. The visible depth is apparently 50 or 60 feet. It finds its source in an underground river and maintains a temperature of 48 degrees, winter and summer. It is not affected by floods or drought. The volume of water flowing from this marvelous spring is seven million gallons daily, sufficient to supply a city of 75,000 population.

No. in Series: 34

Photo by: Mound Photo, Sandusky, Ohio

Publisher: Genuine Curteich-Chicago "C.T. Art-Colortone" post card, a trade name under Curt Teich Co., Chicago, Illinois

Distributor: Geo. H. Tremper, Sandusky, Ohio

Estimated Date: 1930-1940s

Era: Linen Era

Condition: Unused.

The Blue Hole is a freshwater pond and was a tourist site from the 1920s to 1990 and had 165,000 visitors annually.

Wikipedia: en.wikipedia.org/wiki/Blue_Hole_(Castalia)

Publisher/Distributor Notes: According to The Sandusky Register, George H. Tremper was the Erie County treasurer in the 1940s.

Curt Teich emigrated to Chicago in 1895. He had worked as a lithographer in Lobenstein, Germany.

He founded the Curt Teich Company in 1898, concentrating on newspaper and magazine printing. He was an early publisher of postcards, but he didn't begin printing them himself until 1908.

According to MetroPostcard.com, "As his competition dwindled, his sales expanded and his American factories would eventually turn out more postcards than any other in the United States. "

The company was best known for their wide range of advertising and postcards of North America. By the 1920s, it was producing so many postcards with borders that they became recognized as a type dubbed "White Border Cards," creating an "era."

Curt Teich started using offset presses in 1907, but it took a number of years before he had offset presses made to his satisfaction, and many more years for him to perfect the method.

His innovations in this printing technique directly led to the production of what we now call "linens" by the early 1930s.

The company aided the war effort during the second world war by also printing many military maps.

Curt Teich eventually turned management of the company over to his son, but he remained active in company operations throughout its history.

Curt Teich died in 1974 and the family business was sold to Regensteiner Publishers who continued to print postcards at the Chicago plant until 1978 when the rights to the company name and processes were sold to the Irish company, John Hinde Ltd. Their California subsidiary now prints postcards under the name John Hinde Curteich, Inc.

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