Discontinued - you can grab Solar Digital Calipers instead! 

Caliper rule? Tire tread gauge? Ruler? Thread scale? Writing instrument? The Messograf is all of these in one.

It is a multipurpose instrument, constructed of chromium-plated brass for those who demand more than just the joy of writing.

Many have tried to copy it - none have succeeded. This is the original.

This retractable ballpoint pen has a large ink cartridge. Made in Germany.