We're not strangers to promotional pens of varying styles and prices. After all, we stock budget plastic pens here right through to premium Parker brand units. But luxury producer Mont Blanc's latest addition to their catalogue could well be the world's most expensive promotional pen -- and with good reason!

Luxury Pen With Unique Features

Mont Blanc's one-of-a-kind promotional pen pays tribute to Johannes Kepler, 16th century mathematician and astronomer, best known for bridging the gap between astrology and astronomy. It's fitting then that this refined pen is adorned with astrological symbols as well as an abundance of jewels (set to look like the Milky Way). And when we say there's a lot of jewels we mean it -- 5,294 sapphires and 570 diamonds! That's why this pen is worth 1.5 million US dollars! (In Australian dollars, that's almost $2 million!)

If the gems on the outer weren't enough to get you interested, the Kepler High Artistry Stella Nova Limited Edition 1 pen (yes, that's what it's called) also features a diamond on its nib and a 6.2-carat D-flawless diamond on its cap. To sweeten the deal the pen comes with two matching cuff links. If you're an astronomy nut you'll also notice the various constellations and nods to Kepler's three laws hidden like Easter Eggs throughout the pen.

Not only does it look the part, but the pen features a refined nib for maximum writing capacity. Though with the near 2 million dollar price tag I'm not sure this pen is suited to everyday office use! Personally, when it comes to premium promotional pens I think I'll stick with an individually engraved Parker, rather than a pen with so much blind I'd be scared to use it! What about you? What's your favourite style of premium promotional pen? Let us know on Twitter or Facebook!

Pen first spotted here: http://www.architecturaldigest.com/story/montblanc-pen-inspired-johannes-kepler