Fairly standard tolerances for industrial and academic labs. All of our scales (we don't have balances anymore; they're all electronic) in the analytical lab weighing room are good to 0.1 mg. Unfortunately we don't have the kind of tables that Alan designed, so our students are admonished not to lean on the tables while working. One student leaning on the table screws up all of the scales on that table for a few moments at least.
Best -- Terry