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![Two world's fair wonders. Hornung M'f'g Co., manufacturers of "Challenge" [and] "Columbus," revolving and reclining barbers' chairs](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzE4OTUvMDEvMDEvdHdvLXdvcmxkcy1mYWlyLXdvbmRlcnMtaG9ybnVuZy1tZmctY28tbWFudWZhY3R1cmVycy1vZi1jaGFsbGVuZ2UtYW5kLWNvbHVtYnVzLTY0MC5qcGc%3D/40/52/webp "Two world's fair wonders. Hornung M'f'g Co., manufacturers of \"Challenge\" [and] \"Columbus,\" revolving and reclining barbers' chairs")
Two world's fair wonders. Hornung M'f'g Co., manufacturers of "Challen...
Advertisement featuring a perpetual calendar in the shape of a ferris wheel and a barber's chair.
Advertisement featuring a perpetual calendar in the shape of a ferris wheel and a barber's chair.