Slide Rule KL-1 Log
Yes, hard times, BUT 
The country & city lives and the postal service works well.

 The convenient transparent box is made of impact-resistant plastic.
 It's not the brittle plastic used in disposable packaging, but polyethylene,
 which won't shatter if dropped or hit.
 It's reliable protection that won't break. 
The lid will never get lost. 
You can always see whether there is a ruler inside or not.

The KL-1 circular logarithmic ruler is designed to perform
 the most common mathematical operations in practice: 
multiplication, division, combined actions,squaring, 
extracting the square root, finding trigonometric sine and 
tangent functions, as well as the corresponding inverse 
trigonometric functions,calculating the area circle.
The slide rule consists of a case with two heads, 
2 dials, one of which rotates with a head with a black dot and 
2 hands that rotate with a head with a red dot. 
There is a fixed pointer against the head with 
a black dot above the moving dial.
On the moving dial there are 2 scales: 
internal - main - countable 
and external - scale of squares of numbers. 
On a fixed dial there are 3 scales:
the outer scale is a countable analogous
 to the internal scale on a moving dial, 
the average scale is of "S"-
values of angles for counting their sines and 
the inner scale of "T" -
values of angles for counting their tangents.

English manual included.
Great gift ! 

Shipping:
                                          1. Worldwide,  delivery will be made by Registered Airmail with track number.
                                          2. The item(s) will be sent within 1-2 business days after the payment is received.
                                          3. Goods will be sent from Kiev -the capital of Ukraine. Smallest delivery way.
        
If there is no mail failure, no more delivery time is 12-15 days to
European countries, 14-21 days to the USA, Japan, Australia .
Therefore, real typical delivery  time to USA & Europe  about 7-10 days,
Japan & other about 10-14 days.
Safe packaging guarantied !
5 star reputation and customer
satisfaction  is our most important goal.
Please contact us with any questions 

and we greatly appreciate your feedback !
Have a great day !