AHS 70

AHS 70 | 17jewels.info - The Movement Archive

AHS 70


The ASH 70 from the german manufactory Alfred Hirsch from Schwenningen is a 10 1/2 ligne pin lever movement with indirect center seconds indication, which uses no less that 21 jewels. At launch time, in the early 1960s, the buyers still could be fooled with these high numbers.

AHS 70: base plate

base plate

Of course, you immediately see, that this simple pin pallet movement in pillar construction is no haute horlogerie, as its “21 jewels” want to suggess. Nevertheless, it is positive, that all important bearings contain rubies. Not only ruby bearings, but all of them with cap jewels, too. Unfortunately, the cap jewels cannot be removed, which leads their function useless, because it is not possible to clean the bearings.

AHS 70: gear train

gear train

The gear train is the traditional one: The mainspring barrel with ratchet on the dial side drives the center minute wheel, followed by third wheel, seconds wheel at 6 o’clock (which could, theoretically, carry a decentral seconds hand on the dial side) and finally the steel escape wheel.

On top of the gear train bridge (in fact a 3/4 plate), there’s the center seconds wheel, which is beared under its own cock. It is driven by a wheel on top of the prolonged axle of the third wheel.

AHS 70: side view of the gear train

side view of the gear train

The simple, two leg anular balance is not shock protected and runs in simple ruby bearings with cap jewels. It beats contemporarily slow with 18000 A/h and can be adjusted by a short regulator arm and a scale on the balance wheel cock.

AHS 70: AHS 70: Dial side

AHS 70: Dial side

On the dial side, you see the rocking bar winding system and the very simple executed ratchet, which consists only of a single spring, which engages and blocks the ratchet wheel.

In the lab

The specimen shown here was completely gummed and showed a visible water damage. It got a simple revision, which brought it back to life.

Technical data

Size:10 1/2''' (measured: 23,7mm)
Number of jewels:21
Escapement:Pin lever
Balance types: Nickel anular balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Short regulator arm
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel, mainspring barrel
  • center second pinion
Construction type:pillar construction
Winding mechanism:rocking bar winding system
Setting lever spring:2 hole(s)
  • SCI (indirect center seconds)
References: Flume: 1962 26
Mentioning in literature (years): 1964 - 1969
Inventory number:20035

Usage gallery

AHS 70: Selecta de Luxe ladies' watch

Selecta de Luxe ladies' watch

Caliber Family
AHS 70