Notes on the Hermle 340 / 341 series

The Hermle 341 and 340 series is a spring driven westminster chime unit that takes a size #8 key. This is a square shaped movement with the movement plate size of 100 x 100mm. What is being offered on this page is the movement only with out the pendulum, gong or dial. These movement come as the movement itself with its hand nut and if a pendulum unit, comes with the suspension spring and leader.

Timing a balance clock movement

There are two balance movement styles produced by Hermle. The old style and then the new style.Read More »

Old Style The old style is one with a round spring that goes up and down (Vertical) in a circle around the center arbor of the balance wheel. In this style there is a slide arm with a tiny weight on the balance wheel itself. There is a + and - on the wheel. To speed up time go towards the plus sign. However this style is not always easy to regulate and can be very hard to get it perfect. The factory has special devices to make it perfect however it’s not that easy on the customer end with this style balance and this is why it has been improved upon. If you have the old style balance then your clock movement has some age to it and you may want to replace the unit anyway. We have the movement brand new with the new style balance for less than the cost of a cleaning on your old unit. Figure your clock movement has lasted you 25 years or so then in theory the new unit should last more than this with the improved aspects.

New StyleThe units offered on this page all have the new and improved balance assemblies. Despite the change on the balance, these units are a direct fit and will install in the clock case the exact same way as the old unit. If the numbers match from the old unit to the numbers offered on this page, than the movement will be the exact same as it is now but brand new and with the improved balance. The improved upon balance units have a different kind of hairspring (Horizontal) and a screw to regulate it rather than a slider arm. The regulator screw is on the back of the movement near the balance and has a + and - sign next to it. If the clock needs to be faster to keep time then the screw would be turned to the plus and opposite for slowing time.

  • Less cost than a cleaning in most cases
  • Should last 25-30 years, a repair would not
  • Easy to install, we can help if needed
  • Ships same day as order

Hermle 341 Series

Selecting the movement

The numbers on the back plate of the movement is everything one needs to get a replacement.

If the numbers match then the movement matches.

If the clock is a pendulum unit, be sure to select the proper CM length that matches the old unit.

340-020
  • Balance Escapement
  • 33.2mm Hand shaft
  • 5 Hammer Below
  • Spring Driven

$249

Front Side Back

341-020
  • Pendulum Unit
  • 33.2mm Hand shaft
  • 5 Hammer Below
  • Plate size 100 x 100mm
  • The 11cm includes pendulum

$249

Front Side Back

340-020K
  • Balance Escapement
  • 33.2mm Hand shaft
  • 5 Hammer Below
  • Calendar Movement

$319

Front Side Back


341-020K
  • Pendulum Unit
  • 33.2mm Hand shaft
  • 5 Hammer Below
  • Calendar Movement

$269

Front Side Side Back

341-021
  • Pendulum Unit
  • 27.6mm Hand shaft
  • 5 Hammer Below
  • Plate size 100 x 100mm

$249

Front Side Back


Clock Hands 341 / 340 Serpentine Hands

Most popular choice are these Serpentine hands for the 341 / 340 Hermle Clock Movement. The dial diameter is also called the time track, it is the ring from outside the 9 to outside the 3 . The minute hand has a 2.8mm square mounting hole that is in a round bushing that rotates with in the hand, the hour hand has a 4.5mm round hole.

Item #CH3

Clock Hands 341 / 340 Spade Hands

Spade hands for the Hermle 341 / 340 Hermle clock movement. The dial diameter is also called the time track, it is the ring from outside the 9 to outside the 3 . The minute hand has a 2.8mm square mounting hole that is in a round bushing that rotates with in the hand, the hour hand has a 4.5mm round hole.

Item #CH1

Clock Hands 341 / 340 Regulator Hands

Regulator style hands that come in 5 and 7 inch dial diameters. The dial diameter is also called the time track, it is the ring from outside the 9 to outside the 3. The minute hand has a 2.8mm square mounting hole that is in a round bushing that rotates with in the hand, the hour hand has a 4.5mm round hole.

Item #CH2

Clock Hands 341 / 340 Maltese Hands

Maltese style clock hands for the Hermle 341 / 340 movement series. This style only comes sized for a 5" Dial diameter. The dial diameter is also called the time track, it is the ring from outside the 9 to outside the 3. The minute hand has a 2.8mm square mounting hole that is in a round bushing that rotates with in the hand, the hour hand has a 4.5mm round hole

#CH12 - $14


Hermle Clock 1161 Suspension Spring 341 Pendulum Suspension Spring

Proper suspension spring for all of this Hermle clock movement series. If ordering a new movement, keep in mind a new movement will come with the suspension already included. It sure is a good idea to have a spare also if you choose to get this and put it on the bottom of the clock case for next time. There will be a next time, there always is when it comes to suspensions, this would make a nice spare instead of searching endlessly in the future for it.

Item #SUSA2

Hermle Clock Key Size 8 341 Key Size #8

This is the correct size key for the this Hermle movement series. These units are 8 day movements, so you wind once per week.

Item #KEY8

Clock Parts German Hand Nuts German Hand Nuts

12 Assorted hand nuts for German movements. With this assortment of hand nuts you will get one for your German movement with no problem.

Item #CP9 $10


Clock wood stick pendulum Wood Stick Pendulum for 341

Wood stick pendulum with polished brass bob for the hermle 341 clock movement series. On the back of the clock movement will be the CM stamp. This is not the actual length of the pendulum itself, rather this CM represents the pendulum and leader and suspension all in one measurement where the clock will keep time. All that needs to be done is order the cm length as stamped on the movement, and the pendulum will be the proper length. The bob is the round disk at the bottom of the pendulum and should have about 2 inches on each side to swing around.

#StPend341


Dating Hermle clock movements

Prior to 1988, the year was two digits (79 was produced in 1979).
Starting in 1988 the year of was indicated by a letter.

  • A/1988
  • B/1989
  • C/1990
  • D/1991
  • E/1992
  • F/1993
  • G/1994
  • H/1995
  • J/1997
  • K/1998
  • L/1999
  • M/2000
  • N/2001
  • O/2002
  • P/2003
  • Q/2004
  • R/2005
  • S/2006
  • T/2007
  • U/2008
  • V/2009
  • W/2010
  • X/2011
  • Y/2012
  • Z/2013
  • AA/2014

HERMLE MOVEMENT DIRECTORY

Hermle movement number starts with....