After reading a section in "The Compleate Phonograph" book it states that Taiwan made authentic repros of the trademark berliner. Reiss indicates that the only way to tell is by the screws and bolts which are metric. Is this the only way to tell? Are they that good of a repro that it could fool a collector, and finally how long ago were these made? I'm aware of the "Crapaphones", but they are easy to identify.