I found this amongst a box of 78’s that came from Cindy’s uncle.

Ah, records.

I noticed that this one mentions 4 speeds and includes 16 2/3 r.p.m. talking book records. That was a new one on me. So I googled it and here is an interesting article that discusses the speeds. Very interesting history for you audiophiles. Enjoy.

http://www.straightdope.com/columns/read/228/why-are-record-speeds-33-45-and-78-rpm