Tissot 709-2

 
Tissot 709-2

Tissot 709-2

Description

Around 1960, Tissot launched a tiny handwound movement series for ladies’ watches with a diameter of only 6 34 lignes (15.1mm). It was produced several years and got two subsequent versions. This was the Tissot 709 series and the Tissot 709-2 described here was the last modification of the base movement Tissot 709.

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gears and trains

gears and trains

It is a contemporary construction with a directly driven center minute wheel. The round shape of the plates made it possible to use a relatively large screw-less ring balance.

side view of the gears

side view of the gears

Unlike is predecessors, the Tissot 709-2 no longer uses a KIF Duofix bearing for the escapement wheel, but only a standard jewel. The seventeenth jewel is now used as bearing for the minute wheel on the dial side. You can see this jewel on the photo below - it’s the smallest ruby in the movement, located near est to the center.

The screw-less ring balance, which is beared in two Incabloc shock protection bearings beats with no longer top modern 19800 A/h and controls a conventional swiss pallet lever escapement.

base plate

base plate

On the dial side, you can easily spot the second Incabloc bearing of the balance, as well, as the yoke winding system with its setting lever spring.

The minute wheel (at 4:30) has got four holes, which allows oling of the underlying driving wheel without dismounting and it is beared in a ruby.

Tissot 709-2 dial side

Tissot 709-2 dial side

The changes to the Tissot 709-1 are, besides the now ruby-beared minute wheel with its own pivot, a slightly changed setting lever spring, larger cutouts on the dial side for the mainspring barrel, a smaller cutout for the setting yoke and the missing KIF Duofix bearing for the escapement wheel.

Technical data

Manufacturer:Tissot
Caliber:709-2
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel anular balance
Shock protection(s): Incabloc
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Functions:hour, minute
A/h:19800
Size:6 3/4''' (measured: 15,3mm)
Literature: Flume: K3 -

Usage gallery

Tissot ladies' watch  (only dial)

Tissot ladies' watch (only dial)

Many thanks to [Klaus Brunnemer]() for the donation of that movement!