AHS 70

Description

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.

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.

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.

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.

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

Technical data

Usage gallery