Hey, I paid $24 for that painting!
Actually no idea here. Most of his self portraits appear to face the way you are showing it, but even when facing this way he apparently "reversed" aspects of them, but always seemingly facing the way you are showing. I can't remember where I found that and it may well be not shown right wherever it was, but your question at least got me to read a little bit and it's interesting stuff.
I just sent an email to the Van Gogh Museum in the Netherlands, hopefully they’ll reply, I’ll keep you posted.
The Museum about Vincent van Gogh in Amsterdam
Official website of the Van Gogh Museum in Amsterdam. Book your tickets safely at tickets.vangoghmuseum.com, and plan your visit. Enjoy Vincent van Gogh's masterpieces such as Sunflowers, Almond Blossom, Wheatfields, and The Bedroom. See exhibitions, join guided tours, workshops, and more.
www.vangoghmuseum.nl