This is another old style postcard, this time featuring Ice Lake, near the town of Iron River in Michigan.
The L.L. Cook Co., Milwaukee, WI
These old style postcards are actually photographs formatted as a postcard, and marked with descriptions in white lettering on the bottom. The back of the postcard is typically unmarked except for a stamped impression of the word Post Card, a stamp box, and two headings labelled correspondence and address. Presumably this was to help those unfortunate enough not to know how to correctly send a postcard.
It is unused and undated, but is likely contemporaneous with other similar cards in this collection, and dates from the 1940’s.