Tony,NEFaurora wrote:Fran, You are also forgetting three major things..
1. Diamond Disc Dataplates (as well as Amberola dataplates) went from Aluminum with Black painted background (1913-1917) to All Brass Dataplates with White paint then later Black paint (1918-1929).
2. 1926 thru 1927 C-19 machines also came with 10" and 12" buttons that were present but disconnected from the factory ( for Extra Long Play (ELP) feature when installed also with a special "Dance" reproducer for longer 12" records, and turntable felt cloth was also changed to Orange from the previous and former Green this year also.
3. 1927 C-19's (last year made) machines had NO Speed control in the upper left corner of the turntable. Remaining inventory of C-19's were sold until 1929 when Edison closed.
Do not forget to add these things into your data.
)
Tony K.
Your observations interest me.
1. You cite the aluminum/black painted data plates as being used from 1913-1917. This suggests the last two years' production of C-250s (manufactured until 1919) were equipped with the later data plate. I have not encountered a C-250 with the later data plate, and I would be grateful to learn of one. A photo would be most appreciated for my files. I'm always glad to learn more about these machines.
2). You mention the "10" and 12" buttons that were present but disconnected from the factory ( for Extra Long Play (ELP) feature when installed also with a special "Dance" reproducer for longer 12" records..." The 10"/12" record starting buttons were supplied on several models of the Edison Disc Phonograph as early as 1924 if I remember right; some with single mainsprings. These were not intended exclusively for use with Long Playing records, but with a planned (but never released) line of 12" 150 tpi Edison Discs. I'm familiar with the Dance Reproducer, but I have not encountered information on the "...special "Dance" reproducer for longer 12" records." I think you must mean the Long Play Reproducer, but it was designed for either 10" or 12" 450 tpi Edison 20-Minute or 40-Minute (respectively) Discs. Finally, I'm guessing that the "Extra Long Play (ELP) feature" you mentioned was the Long Play (LP) attachment.
3. The lack of a speed control above the bedplate (I'm sure you didn't really mean "turntable") can be easily ascertained when a very late serial number is reported, simply by checking back with the respondent. This variation is fairly scarce, so it will require little effort.
Fran had a choice when developing his questionnaire: to keep it simple enough to encourage owners to respond while covering major points, or to address every possible variation such as cabinet factory number, wood type, finish type, turntable felt color, type of data plate, presence of a speed control above the bedplate, etc. I think Fran struck a nice balance and covered all the important production changes while avoiding owner-added options (such as finding an Edisonic Reproducer on a C-250, which contributes nothing to the historical database). I applaud him for his efforts!

I also applaud all the respondents for contributing their data. Tony, I hope we will soon see your data on the C-250 and C-19 you mentioned some time ago on a different thread.
George P.