Edison made a Spanish series blue amberol that says 2M on the top, 1200 
series.  Blue amberols have a plaster of paris core, the early ones were 
coated and the plaster appears dark.  Some 2M Indestructibles do not have 2M 
on them.  If you have questions contact me off list and I will answer.  
[email protected] The best way for eBay is to have the seller send a 
close up photo of the top and the grooves.

Steve

>
>Here's what I (think I) know so far:  all brown wax cylinders are 2-minute
>and all Blue Amberolas are 4-minute...  right?  And Indestructibles have 2M
>or 4M printed on the edge with the title...  right?  Can someone help us
>out?  I'm probably doing more harm than good!
>
>I've been wanting to ask this for a while myself.  Thanks, John, and thanks
>in advance to anyone kind enough to fill in the holes!
>
>Best to all,
>Robert
>


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