AS 1525

 
AS 1525

AS 1525

Description

The AS 1525 is the base caliber, of which there exists also a larger version, the AS 1526.
The only difference between the two is the base plate, which measures 10 1/2 lignes here and 11 1/2 on the AS 1526.

With a height of only 2.8mm, it builds very flat, which corresponded to what fashion demanded at the time.

This simple windup movement was quite popular in then 1960s and was honoured many times on the german quality check “Staatliche Qualitätsprüfung für die deutsche Armbanduhr”.

base plate

base plate

Of course, all important bearings contain rubies. Only the mainspring barrel and the base plate bearing of the minute wheel use metal bushings. To achieve the number of 17 jewels, the movement side escape wheel bearing uses a cap wheel.

gear train

gear train

The gear train is the classical one: The mainspring barrel drives the center minute wheel, followed by third wheel, seconds wheel and filigree steel escape wheel.

Seitenansicht des Räderwerks

Seitenansicht des Räderwerks

The specimen shown here uses an anular balance with two legs, which is shock protected by two Incabloc bearings. It still beats slowly with 18000 A/h and can be regulated at the hairspring key only.

AS 1525: Dial side

AS 1525: Dial side

For reducing height, the base plate is slanted on its outer edges and a part of the mainspring barrel is free.

In the lab

The specimen shown here came without case into the lab and got a simple service treatment.

Timegrapher result

The timegrapher results are pretty good, but in contrast to the AS 1526 in the archive, which uses a Glucydur balance, they are a bit less good.

horizontal positions
dial up +2 s/d 300° 0.4ms
dial down +-0 s/d 317° 0.2ms
vertical positions
crown right (12 up) +2 s/d 272° 0.1ms
crown up (3 up) -4 s/d 273° 0.1ms
crown left (6 up) +11 s/d 273° 0.4ms
crown down (9 up) +20 s/d 268° 0.6ms

Technical data

Manufacturer:AS
Caliber:1525
Size:10 1/2''' (measured: 23,0mm)
Height:2.8mm
A/h:18000
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel anular balance (three legs)
Shock protection(s): Incabloc
Balance bearing / direction hairspring:Clockwise
Moveable stud:no/yes
Adjust mechanism:Hairspring key
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:3 hole(s)
References: Flume: 1962 8
Mentioning in literature (years): 1963 - 1971
Inventory number:20062

Usage gallery

Para Klasse tailcoat watch (case missing)

Para Klasse tailcoat watch (case missing)