Autograph endorsement in pencil, "Blinne, Yes—TAE," on a letter written to him by F. S. Blinne, one page. 8.5 x 11, no date but circa 1924. Blinne's letter concerns the procedure for testing records, in part: "We have found a suitable location for testing Viley's records in Bldg 21 and the booths should be ready in a few days…I noticed to-day that in filling an order…that 25% of these were marked E indicating that they were new heavy varnish records. Your instructions call for testing every record from stock. Inasmuch as my testing has shown this new work to be 90% F.G. or better it would greatly expedite the work if we accepted these heavy varnish records…without further testing." In fine condition. Edison carefully controlled the processes in his factories and laboratories, and had famously introduced the 'Edison Diamond Disc Record' in 1912.
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