Looking at the model number, the "09" looks like it could represent the voltage output, and the "1500" looks like an amperage rating. I googled the model number, and found that, in fact, that's correct. It's 9V at 1.5A.
Reference:
http://www.smp-tech.com/power_suppli...op_usjapan.htm
Beware of polarity. Usually, these things are center positive, but not always.