Vintage Soviet Circular Slide Rule KL-1 Logarithmic Calculator
Perfect working condition. English manual and durable storage box included!
📦 Key Features & Benefits
- Durable Protection: Comes in a convenient, transparent box made of high-impact, shatterproof polyethylene plastic. The lid is securely attached so it won't get lost.
- Complete Set: Includes the original-style KL-1 circular slide rule and an English user manual.
- Great Gift Idea: A unique and practical collectible for engineers, math enthusiasts, and vintage tech collectors.
⚙️ Capabilities & Technical Details
The KL-1 circular slide rule performs all essential mathematical operations:
- Multiplication, division, and combined calculations
- Squaring and extracting square roots
- Finding trigonometric sine (S) and tangent (T) functions
- Calculating the area of a circle
Design & Scales:
- Front (Moving Dial): Features 2 scales (Internal main counting scale + External scale of squares). Rotates via the black-dot knob.
- Back (Fixed Dial): Features 3 scales (Outer counting scale, Middle "S" sine scale, Inner "T" tangent scale). Hands rotate via the red-dot knob.
✈️ Fast & Safe Shipping from Kyiv, Ukraine
Yes, times are challenging, but the country, city, and postal services are operating reliably and efficiently!
- Origin: Shipped directly from Kyiv, Ukraine (capital city, ensuring the fastest routing).
- Dispatch: Ships within 1-5 business days after payment.
- Tracking: Registered Airmail with a fully trackable international number.
- Safe Packaging: Guaranteed secure and protective packaging so your item arrives safely.
Typical Delivery Times:
- USA & Europe: Usually 7–10 days (up to 14-21 days max if any transit delays occur).
- Japan, Australia & Worldwide: Usually 10–14 days.
⭐ Customer Satisfaction Guaranteed
Our most important goal is a 5-star reputation and your complete satisfaction. Please feel free to contact us with any questions before or after purchase. We greatly appreciate your feedback!
Have a great day and happy bidding!