| Manufacturer | Pickett & Eckel |
| Model | N-535-ES |
| Serial No. | |
| Scale length | 25 cm |
| Overall length | 30.8 cm |
| Width | 3.8 cm |
| Body/Slide materials | Aluminum, 2.5 mm |
| Post materials | Stamped aluminum (curved cutout) |
| Cursor materials | Nylon / Plastic (groved, convex) |
| Scales |
{L Ln} AI [B ST {T:T S:S} C] D DI K special [special] special |
| Accessories | Black leather case stamped "Eastfield Digital Electronics" w/ plastic insert, near mint condition. Black leather belt clip. Box with slight wear. Guarantee card. Three Manuals: How to use Trig slide rules, How to use Ln-L Scale slide rules, How to use Electronic Technicians slide rules. |
| Notes | Slide rule is near mint condition in original protective plastic sleeve. |
| Tag No. | PE-535 |