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Felsa 465N

 

Felsa 465NFelsa 465N

Description

Felsa was a manufactury, which was known for their quality movements. The large caliber 465N with 11 1/2 lignes was one of them. It has got a direct driven center second hand and a kind of sandwitch construction, which allows larger sizes of the parts and thus higher precision and longevity.

different versiondifferent version

In another version, this movement was equipped with an Incabloc shock protection and a normal cap jewel.

In contrast to caliber 465, the caliber 465N has got a little cruder bridges.

base platebase plate

The base plate of this movement shows, that it its gear train is built in counterclockwise direction. All important bearings, except of those for the mainspring barrel and minute wheel are equipped with rubies.

base plate with minute wheelbase plate with minute wheel

As common for movements of the 1950ies, there's a central minute wheel, which is here beared under a bridge and not only under a cock.

gear traingear train

It's the usual gear train for the 1950ies: Directly driven center minute wheel, on top the third and seconds wheel and finally the escapement wheel.

side view of the gear trainside view of the gear train

The reason, why Felsa used that very space saving gear train with balance wheel at 6 o'clock, while at the same time, there's a lot of unused space, is unknown.

One thing is for sure, and that's, that the screw balance beats with 18000 A/h and regulates a swiss pallet lever movement. The effective length of the hairspring can be adjusted by a long regulator arm.

A speciality of of one specimen this movement unfortunately cannot be seen in the pictures: The pallets of the anchor are made of a almost translucent, a very little blueish material. Probably this was better (and more expensive) as the normally used synthetic rubies.

Felsa 465N dial sideFelsa 465N dial side

On the dial side, you can easily see the yoke winding system with its characteristically shaped setting lever spring (unfortunately broken on this specimen) and the engraved partial minute dial, which helps adjusting the movement when it's not yet put into a case.

 

 

 

 Technical data

ManufacturerFelsa
Caliber465N
Number of jewels17
EscapementAnchor with pallets
BalanceNickel screw balance
Shock protection(s)Farr I,Incabloc
Balance cock directionclockwise
Hairspring studfixed
Regulator typeLong regulator arm
Movement constructionFork
Escapement wheel, Fourth wheel, Third wheel
Center wheel
Mainspring barrel
Construction typesolid construction
Winding mechanismyoke
Setting lever spring3 holes
FeaturesSCD
FunctionsHour, minute, second
Beats per hour18000
Life angle52.23°
Size111/2''' (measured: 25,6 mm)
Image in Flume Werksucher K2 -
Inventory ID 17025
Felsa 465NFelsaFelsa465N11 1/2''''''Felsa 465N17 Jewels, 11 1/2'''''', 18000 A/h, SCD
Factsheet

 

 

 

Usage gallery

Hoffmann gents watchHoffmann gents watchDelbana gents' watch  (missing case)Delbana gents' watch (missing case)

 

 

 

Thank you very much to Rolf-Jürgen, who donated the Delbana movement for parts and so helped to get the archived Hoffmann watch and movement running again!