EB 8503 – interchangeable spare parts

EB 8503 movement

Which spare parts fit the EB 8503 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

29Parts with interchange data

7Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of EB 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
161ISO 80.400	Centre tube	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
181ISO 20.040	Barrel for drilled core	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
197ISO 20.070.06	Core and ratchet wheel, riveted	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
199ISO 20.062	Barrel axle	EB 8501 2e EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
203ISO 30.012	Intermediate wheel and pinion	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
210ISO 30.025	Third wheel	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
227ISO 30.027	Sweep second wheel	EB 8501 EB 8511 EB 8513 Height 678 EB 8501 EB 8511 EB 8513
243ISO 31.081	Cannon pinion without clam notch	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76 Height 230 EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
255ISO 31.046	Hour wheel	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76 Height 150 EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
260ISO 31.041	Minute wheel	EB 8501 2e EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
301ISO 40.301	Regulator for flat hairspring	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
401ISO 51.010	Winding stem	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
420ISO 31.023	Crown wheel	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
423ISO 81.136	Crown wheel core	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
425ISO 51.120	Click	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
430ISO 61.080	Click spring	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
450ISO 31.100	Setting wheel	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
453ISO 31.101	Intermediate setting wheel	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
543ISO 81.276		EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
790ISO 30.041	Pin escape wheel, pivoted	EB 8501 EB 8511 EB 8513
792ISO 40.101.41	Balance staff for roller	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
793ISO 40.054	Balance with roller, regulated	EB 8501 EB 8511 EB 8513 EB 8501 EB 8511 EB 8513
799 = 799 DancISO 40.120		EB 8501 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
799/4ISO 40.123	Small roller	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
821/792ISO 40.101.26	Balance staff for roller and for shock-protecting device	EB 8501 EB 8501-76 EB 8503-76 EB 8511 EB 8511-76 EB 8513 EB 8513-76
2542ISO 33.060	Date setting wheel	EB 8503-76 EB 8513 EB 8513-76
2556ISO 33.020	Date indicator driving wheel	EB 8503-76 EB 8513 EB 8513-76
2557/1ISO 91.440	Date indicator, transferred	EB 8503-76 EB 8513 EB 8513-76
2576ISO 53.080	Date jumper, mounted	EB 8503-76 EB 8513 EB 8513-76

Source: original interchangeability lists of EB (checked transcription) and checked original spare-part labels · as of 2026-10-17. Height / execution: the part fits only in this height or execution.

🔗 Movements sharing the most parts

→ All calibers of EB

EB 8503 – interchangeable spare parts

🔧 Interchangeable parts

🔗 Movements sharing the most parts

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