Steve; The only time I have encountered this situation was a piano the came from an oil and gas producing area. I suspect that the mold was caused by the sulphur in the air from the production of gas. This is no longer a problem as the gas producers remove the sulphur before the gas is marketed. By the way does anyone know the adress of the Walker Co., the people who make the Sheffield tuning forks? Ray Hopland RPT, Calgary Chapter
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