Steve, Here are my best guesses! 1. I don't know
2. The serial number is too low for an O reproducer to have a pot metal top. My guess is that the ebay O reproducer has a Model R top on it. 3. I don't know 4.: The O had both a 2" in diameter 1 piece domed top and a flat top. The early flat tops were nickel plated brass and the later being pot metal. The bottom had 2 and 4 minute styluses which had a vertical flip over mechanism . The S has a 2" in diameter 2 piece domed top and both 2 and 4 minute styluses rotating horizontally like the K reproducer on bottom. The R has a 2" in diameter domed top or pot metal flat top and a 4 minute stylus setup like the H reproducer on bottom. The N has a 2" in diameter 1 piece domed top and a spherical weight on the bottom The N56 has a 2" in diameter 1 piece domed top and a trowel shaped weight on bottom 5. I don't know Note: All of the domed tops were pot metal and were the later style tops. On Jul 11, 2013, at 7:00 PM, Steven Medved <steve_nor...@msn.com> wrote: > > > > http://www.ebay.com/itm/EDISON-PHONOGRAPH-MODEL-O-2-4-MINUTE-REPRODUCER-REBUILT-PLAYS-GREAT-/200940043348 > > Here is a model O reproducer serial number 491. > > 1. What year was the reproducer in the photo made? > > 2. What is unusual about the reproducer in the photo? > > 3. When did the first pot metal O tops come out? > > 4. What is the difference between an O, N, and N-56 R S top? > > 5. When did the dome tops come out? > > Note: this has nothing to do with the seller, it is all about learning and > this is the best way to learn as it illustrates several important reproducer > principles I hope to make common knowledge. > > > > > _______________________________________________ > Phono-L mailing list > http://phono-l.org _______________________________________________ Phono-L mailing list http://phono-l.org
