Below is a list of the Lyman 10X SL specifications as found in the operating instructions from 1977 - 1985.

Magnification: 10X

Field of View: 12ft

Tube Diameter: 1 inch

Eyepiece Diameter: 1.550 inches

Objective Diameter: 1.840 inches

Eye Relief: 3.5 inches

Length: 15.5 inches

Weight: 14.5 inches

Adjustments: 3/10 MOA click

Crosshair Options: #3 Center Range, #4 Center Range, #5 Post and Crosswire, #6 Tapered Post, #7 Standard Crosswire, 2 Minute Dot, 1 Minute Dot, 1/2 Minute Dot

Original MSRP: $149.95 (1977)

Inflation-Adjusted MSRP (2026 dollars): $824.00

Additional Features: Parallax adjustable objective, permanently centered crosshairs.