Pickett N600-ES Slide Rule Value Guide

The Pickett N600-ES is a legendary 6-inch all-metal slide rule, famously known as the model carried by Apollo 11 astronauts to the moon. Its distinctive 'Eye-Saver' yellow finish and durable aluminum construction represent the pinnacle of mid-century American engineering tools.

What affects the value of Pickett N600-ES Slide Rule?

• Physical condition of the yellow finish, as scratches or oxidation on the aluminum can reduce value.
• Completeness of the set, including the original leather carrying case and any surviving instruction manuals.
• Smoothness of the slide movement and the clarity of the printed mathematical scales.
• Historical provenance or evidence of production dating specifically to the 1960s space-race era.

How to Identify Pickett N600-ES Slide Rule?

• Verify the 'Eye-Saver' yellow coating on the aluminum body, a signature of Pickett & Eckel models.
• Check for the specific 'N600-ES' model designation printed on the face of the rule.
• Ensure the presence of log log scales and the original leather pocket case often associated with this model.
• Inspect the cursor for the correct plastic tension springs and clear alignment markings.

History of Pickett N600-ES Slide Rule

Pickett & Eckel became famous for producing all-metal slide rules, a departure from the traditional wood and bamboo models. The Eye-Saver yellow color was a signature feature designed to reduce eye strain. This specific model, the N600-ES, is historically significant because a version of it was carried by Apollo 11 astronauts to the moon as a backup for the onboard computers.