I Finally Found One!

From Vsauce.

At least 5 are now known to exist! I posted scans of both sides to r/neutralmilkhotel

#neutralmilkhotel #intheaeroplaneoverthesea #itaots #coverart #reddit #album #musichistory #postcard #1900s #vintage #collection #history #original #jeffmangum #chrisbilheimer #art #indie