Some are 'Grade A' replicas and have to be taken apart or used by a professional to authenticate. I wrote this guide specifically to spot 'Grade A' fakes:) Part 1: How to tell if your pen is a Montblanc ------------------------------------------------------------ The first thing I look for in the pen is the serial number. Almost all Montblanc pens have serial numbers on the ring connected to the clip. Here are a few pictures of where to look: Meisterstuck A good price for a Meisterstuck would be about $100-$150 on Ebay. I would be suspicious of anything less. The Meisterstuck is the most commonly faked Montblanc pen so be sure to check the ring for the serial number. *Normally the number is two letters followed by seven numbers but older models might have less numbers* It should also say 'Germany' around the ring.