This strange (and quite risque for c. 1910) image is apparently a reprint; the caption at the bottom is typeset while the signature is hand-written like most of Otto's postcards. Perhaps it was printed for J.E. Standley, proprietor of Ye Olde Curiosity Shop on Colman Dock.
We do not know the name of the boy (or girl).
A late 1920s or 1930s copy of this photo does have the logo of Ye Olde Curiosity Shop:
There are three other images numbered 2:
Reuse of image numbers and different image series make it difficult to know how many images Otto published.