
George P.
Indeed, that is precisely the wording on mine (SN 7265), which I would estimate to be from about November/December 1915.JohnM wrote:Another subtle difference is the design progression of the 'Official Laboratory Model' medallions affixed to the cabinet in the turntable compartment. The earliest were pentagonal with a circular center and state: 'The $250 Disc Phonograph is the Official laboratory Model', but the verbiage and shape changed over time. It would be interesting to nail down the dates of these changes and corresponding s/n's.