Landeron 520 – interchangeable spare parts

Landeron 520 movement

Which spare parts fit the Landeron 520 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

30Parts with interchange data

34Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of Landeron and the original spare-part labels. All information has been carefully checked but is provided without guarantee. Please verify the interchangeability yourself before fitting, especially the height, diameter and execution of the part.

🔧 Interchangeable parts

Part no.	Description	Also fits
182ISO 20.030	Barrel and cover	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
195ISO 20.060	Barrel arbor	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
201ISO 30.015	Center wheel	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
210ISO 30.025	Third wheel	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
224ISO 30.027.13	Fourth wheel	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
240ISO 31.080	Cannon-pinion	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N
250ISO 31.046	Hour wheel	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N
260ISO 31.041	Minute wheel	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
301ISO 40.301	Regulator for flat hairspring	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
311ISO 70.800	Upper cap jewel with end-piece	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
330ISO 70.801	Lower cap jewel with end-piece	Landeron 48 Landeron 51 Landeron 54 Landeron 55 Landeron 82 Landeron 85 Landeron 86 Landeron 148 Landeron 149 Landeron 151 Landeron 152 Landeron 153 Landeron 154 Landeron 155 Landeron 180 Landeron 181 Landeron 185 Landeron 186 Landeron 187 Landeron 189 Landeron 203 Landeron 248 Landeron 254 Landeron 349 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	Landeron 48 Landeron 51 Landeron 54 Landeron 55 Landeron 82 Landeron 85 Landeron 86 Landeron 148 Landeron 149 Landeron 151 Landeron 152 Landeron 153 Landeron 154 Landeron 155 Landeron 180 Landeron 181 Landeron 185 Landeron 186 Landeron 187 Landeron 189 Landeron 203 Landeron 248 Landeron 254 Landeron 349 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
346ISO 70.807	Lower cap jewel with end-piece, f. esc. wheel	Landeron 48 Landeron 51 Landeron 54 Landeron 55 Landeron 82 Landeron 85 Landeron 86 Landeron 148 Landeron 149 Landeron 151 Landeron 152 Landeron 153 Landeron 154 Landeron 155 Landeron 180 Landeron 181 Landeron 185 Landeron 186 Landeron 187 Landeron 189 Landeron 203 Landeron 248 Landeron 254 Landeron 349 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
401ISO 51.010	Winding stem	Landeron 48 Landeron 51 Landeron 54 Landeron 55 Landeron 82 Landeron 85 Landeron 86 Landeron 148 Landeron 149 Landeron 151 Landeron 152 Landeron 153 Landeron 154 Landeron 155 Landeron 180 Landeron 181 Landeron 185 Landeron 186 Landeron 187 Landeron 189 Landeron 203 Landeron 248 Landeron 254 Landeron 349 Landeron 523 Landeron 540 Landeron 543
407ISO 31.121	Clutch wheel	Landeron 48 Landeron 51 Landeron 54 Landeron 55 Landeron 82 Landeron 85 Landeron 86 Landeron 148 Landeron 149 Landeron 151 Landeron 152 Landeron 153 Landeron 154 Landeron 155 Landeron 180 Landeron 181 Landeron 185 Landeron 186 Landeron 187 Landeron 189 Landeron 203 Landeron 248 Landeron 254 Landeron 349 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
410ISO 31.120	Winding pinion	Landeron 203 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
415ISO 31.020	Ratchet wheel	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
420ISO 31.023	Crown wheel	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
422ISO 81.067	Crown wheel ring	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
425ISO 51.120	Click	Landeron 203 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
430ISO 61.080	Click spring	Landeron 203 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
435ISO 51.050	Yoke	Landeron 203 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
440ISO 61.100	Yoke spring	Landeron 203 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
443ISO 51.080	Setting lever	1st execution Landeron 48 Landeron 51 Landeron 54 Landeron 55 Landeron 82 Landeron 85 Landeron 86 Landeron 148 Landeron 149 Landeron 151 Landeron 152 Landeron 153 Landeron 154 Landeron 155 Landeron 180 Landeron 181 Landeron 185 Landeron 186 Landeron 187 Landeron 189 Landeron 248 Landeron 254 Landeron 349 2nd execution Landeron 203 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
445	Setting lever spring	according to original label Landeron 203 Landeron 522 Landeron 522N Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
450ISO 31.100	Setting wheel	Landeron 203 Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
702ISO 30.040.12	Escape wheel and pinion, pivoted, for two end-pieces	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
704ISO 30.040.10	Escape wheel and pinion, for upper end-piece	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
705ISO 30.040	Escape wheel and pinion	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560
710ISO 40.010	Jewelled pallet fork and stat	Landeron 523 Landeron 523N Landeron 540 Landeron 543 Landeron 543N Landeron 560 Unitas 600 Unitas 600 Unitas 620

Source: original interchangeability lists of Landeron (checked transcription) and checked original spare-part labels · as of 2026-10-28. Height / execution: the part fits only in this height or execution.

🌀 Matching mainspring

Mainspring dimensions for Landeron 520 (height × diameter × thickness × length) and matching mainspring in our shop:

Landeron 520: 1.35 × 12.0 × 0.135 × 380 mm (GR 3520)

🔗 Movements sharing the most parts

→ All calibers of Landeron

❓ Frequently asked questions

Which Landeron 520 spare parts also fit other movements?

For the Landeron 520, 30 part numbers are listed as interchangeable. Together they fit 34 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Landeron 520?

The most shared parts: Landeron 523 (30 parts), Landeron 540 (30 parts), Landeron 543 (30 parts).

Which mainspring fits the Landeron 520?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.35 × 12.0 × 0.135 × 380 mm (GR 3520, hand-wound, normal end hook).