78 rpm

• tango.info 78 rpm - Overview of records listed in tango.info, and details about the sources.
• 78 rpm speed - exact speed)
• 78 rpm tango records - some tango specific observations
• 78 rpm label designs - grouping of tango related albums by similarity of label design
• 78 rpm reeditions

Reported at least for outside tango:

• stereophonic recording, with the "left channel" on side A and the "right channel" on side B
• continuous recording, with the beginning of one recording on side A and the end on side B
• multiple items cut into one track (e.g., test tone, vocal introduction)

Links

• http://www.schellackplattenexpress.de/
• http://www.schellackplattenexpress.de/Label/UntitledFrame-1.htm "Aus welchem Jahr ist meine Platte denn ????????" - listing numbers and years