Mainsprings with special hooks (T-End)

Tension springs with special hooks (T-End) provide a particularly secure and dimensionally stable connection in the barrel and are designed for movements that require precise, resilient engagement of the spring end. The transverse T-End engages cleanly in the corresponding recess and prevents the spring end from twisting or tearing out - even at high torque peaks.

Features
• T-End end for maximum holding force and precise positioning
• Robust spring steel for constant force delivery and long service life
• Clean fit for barrels of many large and small watch movements
• Ideal for revisions where secure spring retention is crucial