EB 8120 – interchangeable spare parts

EB 8120 movement

Which spare parts fit the EB 8120 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

35Parts with interchange data

23Calibers 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.

🛒 Spare parts for EB 8120 in our shop

Winding-Up Wheel Part 1476 for Bettlach EB 8100 2e, 8101, 8103, 8115, 8120, 8121, 8123 – NOS10,90 € incl. VAT *View item

🔧 Interchangeable parts

Part no.	Description	Also fits
163/1ISO 80.400	Center pipe	EB 8100 EB 8103 EB 8123 EB 8127 EB 8140 EB 8143
181/1ISO 20.040.06	Barrel for drilled core with driving wheel / driving pinion	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127
197ISO 20.070.06	Core and ratchet wheel, riveted	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
199ISO 20.062	Barrel axle	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
203ISO 30.012	Intermediate wheel and pinion	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
210ISO 30.025	Third wheel	EB 8100 EB 8101 EB 8121 EB 8140 EB 8141
224ISO 30.027.13	Fourth wheel	EB 8100 EB 8140 Height 320 EB 8100 EB 8140 Height 370 EB 8100 EB 8140
243/1ISO 31.081.18	Cannon pinion, undrilled, without clam notch, smooth hole	EB 8100 EB 8140 Height 222 EB 8100 EB 8140
250ISO 31.046	Hour wheel	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8140 EB 8141 EB 8143 Height 130 EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8140 EB 8141 EB 8143
260ISO 31.041	Minute wheel	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
301ISO 40.301	Regulator for flat hairspring	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
311ISO 70.800	Upper cap jewel with end-piece	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
330ISO 70.801	Lower cap jewel with end-piece	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
401ISO 51.010	Winding stem	according to original label EB 8100 EB 8101 EB 8110 EB 8115 EB 8116 EB 8121 EB 8126 EB 8127 EB 8136 EB 8137 EB 8140 EB 8141 EB 8142 EB 8147 EB 8155 EB 8157 EB 8176 EB 8177 Ø 90 EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127 EB 8135 EB 8137 EB 8140 EB 8141 EB 8143 EB 8155 EB 8157 EB 8175 EB 8177 Ø 120 EB 8121 EB 8123 EB 8127 EB 8135 EB 8137 EB 8175 EB 8177
407ISO 31.121	Clutch wheel	EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127 EB 8135 EB 8137 EB 8140 EB 8141 EB 8143 EB 8155 EB 8157 EB 8175 EB 8177
410ISO 31.120	Winding pinion	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
420ISO 31.023	Crown wheel	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
423ISO 81.136	Crown wheel core	EB 8100 2e EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
425ISO 51.120	Click	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127
430ISO 61.080	Click spring	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
435/1ISO 51.050	Spring yoke	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
443ISO 51.080	Setting lever	EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127 EB 8135 EB 8137 EB 8140 EB 8141 EB 8143 EB 8155 EB 8157 EB 8175 EB 8177
443/5443ISO 51.080.06/.01	Setting lever	EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127 EB 8135 EB 8137 EB 8140 EB 8141 EB 8143 EB 8155 EB 8157 EB 8175 EB 8177
450ISO 31.100	Setting wheel	EB 8100 2e EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
790ISO 30.041	Pin escape wheel, pivoted	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
793ISO 40.054	Balance with roller, regulated	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143 EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
794ISO 40.055	Balance with finger, regulated	EB 8100 EB 8101 EB 8103 EB 8121 EB 8123 EB 8127 EB 8140 EB 8141 EB 8143
1143ISO 22.010	Oscillating weight	EB 8121 EB 8123 EB 8127
1344		EB 8100 2e EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127
1428ISO 52.053	Stop click	EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127
1448ISO 62.101	Stop click spring	EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127
1476ISO 22.020.06		EB 8100 2e EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127
1481ISO 32.031	Reduction gear	EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127
1482ISO 32.033 (32.035	Driving gear for ratchet wheel	EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127
61143ISO 82.245		EB 8100 EB 8101 EB 8103 EB 8115 EB 8121 EB 8123 EB 8127

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 8120 – interchangeable spare parts

🛒 Spare parts for EB 8120 in our shop

🔧 Interchangeable parts

🔗 Movements sharing the most parts

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