The The
Poljot 3133 is a manual winding chronograph movement produced since the 1980's.
Introduced
in the 1970's but not generally available until 1983, Calibre 3133 includes
elements of earlier Venus movements, notably the Venus 150, Venus 188, and Valjoux
7734.
It
is not a copy or clone of these movements, but Poljot did purchase machinery
and tooling and adapt elements of these calibres into the evolving 3133 design.
The
Poljot 3133 is a cam controlled chronograph operating at 21,600 A/h.
It
has a 30 minute counter at 3:00, a small seconds dial at 9:00, and a central
sweep seconds counter along with the hour and minute hands.
A
date window is located at 6:00. Two buttons control the chronograph functions:
The 2:00 pusher for starting and stopping the chronograph, and the 4:00 pusher
to reset the seconds and minute counters. Calibre 3133 is nominally a 23 jewel
movement, but several jewels are used on both sides, allowing some to claim 31
jewels.
This
is quite different from the Venus and Valjoux calibres with which it shares
components and design elements. Those are slow 18,000 A/h movements with fewer
jewels (17). The Swiss movements use an entirely different assortment (balance
and escapement) and has many differences in the bridges and levers. But many
others are identical between the movements. The movements are not
interchangeable either, since the dial feet are located differently, and the
movement is 1 mm thicker. Interestingly, the date wheel on the Poljot advances
clockwise like modern ETA movements, while older Venus calbres used
counter-clockwise date wheels.
There
are a few variants on the basic Poljot design. Calibres 31679 (with moon phase
hand) and 31682 (with day/night display) include extra complications. The 17
jewel calibre 3105 lacks the chronograph functions and simply has sub seconds
at 9:00 and date window at 3:00.
In
the 1970s, the Swiss watch factory Valjoux sold its equipment, which was
produced in the Soviet chronograph 7734 caliber.
It
was the watch factory "Poljot", which used Swiss technology to make a
31 mm chronograph 3133.
Most
parts of poljot 3133 movement are identical to the Valjoux 7734 movement.
Poljot introduced its own modifications into the
swiss mechanism.
These
include the use of precious stones, anti-shock protection system and (Glucydur
balance).
The diameter of the balance was reduced, so 3133 is faster.