Review of the calculator Felix M

Putting order in the garage, he found the adding machine Felix M 1978 release

This is not a gadget with a bunch of electronics, but a heavy representative of old iron.

A long time ago, my father worked as a metalworking engineer, and for calculations they used a piece of paper and a slide rule. Therefore, to speed up the calculations, the father bought himself a mechanical arithmometer in 1978. It was the sunset of the era of adding machines. In 1978, it was relatively free to buy Electronics B3-18A , but it cost 220r at an engineer salary of 120-140p, while the adding machine cost 15p. Actually, the price and the need for constant payments have become a decisive factor. Felix M swept across the union from Cherepovets, where, by the way, was bought, to Baikonur and Vladivostok. And it weighs a lot - just over 5kg.
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Let's start the review. Felix spent the last 20-25 years in the garage, traveled a lot, so his appearance is not the best, but all the mechanisms work fine (even lubrication was not required).

Front view: 1 - addition / subtraction handle
2 - levers for exhibiting a number
3 - the lock
4 - counter reset lever
5 - rev counter
6 - result
7 - shift lever
8 - lever reset result


View from the left side:

Back view:
Stamping close-up:

View from the right side:

Bottom view:

View from above:

Revolution count:

Result:

Below, for example, multiply 11 by 321 for this:
1) we expose 11
2) 1 turn - multiply by 1
3) right shift by 1
4) 2 turns - multiply by 20
5) right shift by 1
6) 3 turns - multiply by 300
it turned out 3531


process video:


UPD
A little bit of viscera: