More information from the Record Store Day site:
Event: RECORD STORE DAY 2017
Release Date: 4/22/2017
Format: LP
Label: Rhino/Warner Bros.
Quantity: 3500
Release type: RSD Exclusive Release
An album of alternate takes from the Mirage Deluxe edition, originally released in 2016. Includes the early versions of Mirage favorites "Gypsy", "Hold On" and "Oh Diane". Previously released only on CD, first time on vinyl.
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"Or maybe she's a witch, who transcends the boundaries of time and space, and traveled back to 1981, for her own reference."