  We calculate gauge invariant observables for Schnabl's solution with analytic
method and with the level truncation approximation. We also compute them for
the numerical solution initially obtained by Sen and Zwiebach in the level
truncation approximation to compare with the one for Schnabl's solution. The
results are consistent with the expectation that they may be gauge equivalent.
We briefly discuss the gauge invariant observables and the action for a
marginal solution with a nonsingular current.
