Otero 28 – interchangeable spare parts

Otero 28 movement

Which spare parts fit the Otero 28 movement? For every part you can see which other calibers use the same part according to the original Otero spare-part labels. We do not have an original interchangeability list from the manufacturer.

1Parts with interchange data

1Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original Otero spare-part labels; we do not have an original interchangeability list from the manufacturer. 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 Otero 28 in our shop

Setting Lever Spring Part 445 for OTERO 25, 27, 28, 29, 236, 334, 437, 78212,95 € incl. VAT *View item ›

🔧 Interchangeable parts

Part no.	Description	Also fits
445	Art.Nr. 445“	Otero 29

Source: checked original Otero spare-part labels · as of 2026-10-17. Height / execution: the part fits only in this height or execution.

🌀 Matching mainspring

Mainspring dimensions for Otero 28 (height × diameter × thickness × length) and matching mainspring in our shop:

Otero 28: 1.45 × 9.0 × 0.11 × 280 mm (GR 3981)

🔗 Movements sharing the most parts

Otero 29 (1 parts)

→ All calibers of Otero

❓ Frequently asked questions

Which Otero 28 spare parts also fit other movements?

For the Otero 28, 1 part numbers are listed as interchangeable. Together they fit 1 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Otero 28?

The most shared parts: Otero 29 (1 parts).

Which mainspring fits the Otero 28?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.45 × 9.0 × 0.11 × 280 mm (GR 3981, hand-wound, normal end hook).