This seems like the best place to post this. I am working on an Ediphone and a Dictaphone at the Vintage Radio and Communications Museum right now(of which I am a volunteer). Mainly the dictaphone though. I was able to record myself talking using old Ediphone blanks on the dictaphone but the blanks have blemishes on them due to age so it is not the greatest quality. Is it ok to play real Edison cylinders on a Colombia Dictaphone? Is the pitch the same?
Here are some picshttp://hermosillo.es.craigslist.com.mx/wan/1007036155.html
http://hickory.craigslist.org/wan/1007046992.html
Also pics of wire recorder and stuff for laquer disc cutter; unlrelated but interesting