The No. 12 is a high-end Monblanc pen - a pen deserving of the "1" as a first number, which was given only to the Meisterstuck/Masterpiece pens. It features a high grade precious resin body and thick gold filled trimmings. The cap ring is beautiful and unique, which is gold filled and gives the pen amazing look. Due to the center ring's enormous width, it prevents cracks from appearing on the cap. Another ring is located on the turning knob, and, besides the aesthetics, it also doubles as crack protection to the turning knob. The pen is near perfectly balanced. The resin shines and is difficult to scratch. It makes it look as if the pen was made just recently rather than many decades ago.
There is an amazing amber-ish yellow ink window over the blue piston shaft, which gives out an amazing color blend, besides providing an easy ink level readout. There is a very precise and satisfying slip-on cap for fast deployment and secure closure. This is called "Aeromatic" by Montblanc, which means it is a pressure tight seal and won't leak on planes or other various pressure environment. These were one of the first pens not to feature a breathing hole on the cap, which keeps the moisture inside the cap. In addition the cap has a very nice and distinct "click" sound when opening or closing the pen.
The front section is easily removable to expose both the barrel and the entire nib unit, so it's very easy and convenient to clean and maintain. The pen features a stunning super smooth superb 18K 750 solid gold nib. The nib is also semi-flexible; it produces wonderful writing with line variation. Montblanc signature stars are located both on the cap and turning knob. The piston is very smooth, with its original silicone cork and takes a considerable amount of ink. This is a true Montblanc Masterpiece as its name implies; the perfect fountain pen.
This particular pen is in excellent preowned, working condition. It comes without the original boxes and papers.