A handsome man poses for his portrait in this cabinet card photographed by a studio in Berlin, Germany. The name of the photographer is uncertain, since the font makes the name indecipherable. Hopefully, a visitor to this site will be able to identify the name and leave it in a comment. The fellow in this image is nicely dressed and displaying a pocket handkerchief. He has a wonderful mustache which curls up at it’s ends. To view other interesting mustaches, click on the category, “Mustaches: (Only the Best).
Buy this Vintage Original Cabinet Card (includes shipping within the US) #5202
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$28.00
Buy this Vintage Original Cabinet Card (includes International shipping outside the US) #5202
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$37.00
THE CABINET CARD GALLERY 
My guess would be “C. Utecht”, if that helps any.
C. Utecht, I absolutely agree. “24, Gartenstraße 24” is situated in “Berlin Mitte”, the old building No. 24 seems to be torn down, as to be seen in a very detailled Wikipedia-Article about that Street, “Gartenstraße” (German).
“Utecht” is written correctly, a family name still to find, probably coming from a town in Nordwestmecklenburg district, in Mecklenburg-Vorpommern, Germany.
Just as an aside, Gartenstraße literally translates to Garden Street, and “neben der Apotheke” means “next to the drugstore” or “…pharmacy”.