Precision at the highest. Originally a chopsticks maker, now they also make some of the best wooden rulers and other stationary such as pen case. They even have a boutique in Paris!
Huge fan of vintages especially the 139, but I don't have any. Indeed a hard job to find vintages in very good original condition. A lot of luck is needed here. My humble approach is to get good modern interpretation (homage) of the historical pieces.
Also nibs from older limited editions write better than the current ones nib my very personal opinion. I feel more comfortable resistance (on the paper) when writing.
On the other hand, Montblanc just used a standard 149 nib for the Hemingway. I kind of believe that Montblanc didn't really want to invest too much in modifying tools and take extra miles to make their very first two limited editions. Maybe they would like to see how the market would react and thus