No 49 Elbridge Twp Sec 21 Geo Tate Tigris Mich
C B 10 x20 and then it is stamped 1949 which is most likely a photograph number.
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Update from MJM:
There is a place called Tigris located in Oceana County, MI. I found a family living in Elbridge Township, Oceana County, MI on the 1870 census. It looks like the word Elbridge is on the photo. The family members were George, age 28, born in Scotland; Sophronia, 20, Canada; Edward 2, MI; George A, 9 mo., MI; and Alfred, 9 mo., MI.