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AS 969

AS 969AS 969

Description

One of the smallest round movements of AS was the AS 969, a movement with a diameter of only 6 3/4 lignes.

It was launched in the early fifties and was, in terms of jewels, completely equipped with 17 jewels. Unlike earlier (15 jewel) movements, the minute wheel is ruby-beared, and the escapement wheel bearing has got a cap jewel on the movement side. Together with the golden toned Glucydur screw-balance, a good precision could be achieved, depite of the tiny size. The hairspring of the balance, which was of course not yet shock protected, was regulated in its effective length by a long regulator arm.

The construction is a bit unusual: Since there was not enough space, the bearing of the fourth wheel is within the diameter of the escapement wheel, so that a stacked construction had to be used.

An interesting detail is the protection of the escapement wheel, as a kind of sickle shaped piece of metal, which protectes the outher teeth agains dirt and careless watch tinkerers.

main platemain plate

On the dial side, there's of course a yoke winding system.

The escapement pallets can be reached by two holes in the plate - especially on such a tiny movement, this is very helpful, when, in a service, the exit pallet has to get a tiny little drop of oil.

AS 969 dial side viewAS 969 dial side view

 

 Technical data

ManufacturerAS
Caliber969
Number of jewels17
EscapementAnchor with pallets
BalanceGlucydur screw balance
Shock protection(s)none
Balance cock directionclockwise
Hairspring studfixed
Regulator typeLong regulator arm
Movement constructionFork
Third wheel, Fourth wheel, Escapement wheel, Center wheel
Mainspring barrel
Construction typesolid construction
Bridge shapeGiraffe, neck left, 4 gears
Winding mechanismyoke
Setting lever spring3 holes
FunctionsHour, minute
Beats per hour18000
Size63/4''' (measured: 14,95 mm)
Image in Flume Werksucher 1952 1
AS 969ASAS9696 3/4''''''AS 96917 Jewels, 6 3/4'''''', 18000 A/h
Factsheet

 

In the lab

The specimen tested here was gummed and not working. It was completely disassembled, cleaned and oiled. Nevertheless, a problem remained: The cap jewel of the escapement wheel pressed to hard on the pivot and brings the movement to halt. Maybe, the cap jewel plate was an incorrect replacement part?

 

Timegrapher results

crown rightcrown right crown topcrown top crown leftcrown left crown bottomcrown bottom 
dial topdial top dial bottomdial bottom 

vertical positions
12 up  -90 seconds/day
3 up  -90 seconds/day
6 up  -60 seconds/day
9 up  -90 seconds/day
horizontal positions
dial down  +20 seconds/day
dial up  -10 seconds/day
timegrapher measurings

Maybe because of the problem described above, and maybe because of the age and abrasion of that vintage movement, the timing results were pretty poor. Nevertheless, with an adjustment, that makes the movement tick a bit faster, all values would have stayed within the range of +- one minute per day, which is acceptable.

Usage gallery

Dugena Festa ladies' watchDugena Festa ladies' watch

 

This movement was donated by Harald Hoeber. Thank you very much!