The "Skylight" is truly an engineering marvel - a pen that showcases all the unique benefits of the original award-winning Homo Sapiens with the addition of the new extraordinary "Skylight" windows. Two transparent windows transform the Homo Sapiens into a unique demonstrator, where the user is not only able to benefit from seeing the remaining level of ink store but is also able to view Visconti's patented "double reservoir" vacuum filling system.
A large window is cut into the pen's barrel, offering a view of the stored ink in the larger ink reservoir, and a smaller window behind the pen's grip offers a view of the stored ink in the pen's second smaller ink reservoir. The double reservoir was patented in 1998, and is undoubtedly the most advanced filling system ever developed in the fountain pen industry. It allows the collector to fill a fountain pen with the equivalent of up to 10 cartridges of ink. Thanks to the two reservoirs, it also helps to prevent ink from leaking during air travel.
The body of the pen is divided into two ink reservoirs, one larger in the pen's barrel, and one smaller behind the pen's nib. When writing with the pen, ink is used from the smaller reservoir, but when ink runs out, the user then transfers ink from the larger back-up reservoir to continue writing. Essentially, the larger reservoir acts as a portable "bottle of ink" inside the pen. The two reservoirs are separated by a cut-off valve, so when it is open, ink can move freely from one reservoir to the other. When the ink in the smaller reservoir runs out, the user opens the valve (unscrewing the blind cap of the power filler) to transfer ink from the larger reservoir to the smaller. Before air travel, the user does the opposite and drains ink from the small reservoir back to the large, and then tightens the valve.
It is made from volcanic lava rock, which makes the pen virtually unbreakable, naturally hygroscopic, and very comfortable to write with. It comes with solid bronze trim, and an 18k gold nib.