I'm figuring it was designed to be a fixie just with different dropouts. Those dropouts are horizontal as well...just face the other way and still allow for fore/aft adjustment like. They have been making those dropouts since the dawn of time. I certainly would not call them vertical. That and the fact that it has no derailleur hanger and there is no mount or hole for any type of rear brake whatsoever. I took a photo of that bottom bracket shell as I thought that might be a clue to someone as to the manufacturer. I paid $10.