What is the value of a Series 1934 A US ten-dollar bill made in San Francisco?

While coins are made in San Francisco, bills at that time were only made in Washington. The city printed on a bill refers to the Federal Reserve district that distributed it.

Because it has a Federal Reserve District name on it, your bill should have a green seal. In that case it's not considered to be very rare and would sell at retail for $12 to $20 depending on its condition.