TISSOT
17.5-770 Previous product 1/11 Next product
Mainsprings for wristwatches and pocket watches
Boley mainsprings are synonymous with high quality and reliability in watch technology. They are made from a specially developed, highly resilient material and are suitable for both wristwatches and pocket watches.
Properties
• Antimagnetic
• Corrosion-resistant (non-oxidising)
• Self-lubricating
• Low fatigue and durable
• Particularly break-resistant
name17.5-770
width1.45
Ø7.0
thickness0.09
length240
calibreTISSOT 17.5
item No.98800770175