mainspring

Its hairspring, mainspring, ruby bearings and a few other parts were sourced from Switzerland.

“It’s how my father taught me. If I don’t wind it consistently, it won’t keep time as well. And if I overwind it, the mainspring might break.”

The question of appropriation is the editorial mainspring of “The Dolphin Letters.”

This was the mainspring of the anti-liberal revolt in the region.

There was a box for the mainsprings, a box for the hammers, a box for the faceplates and a box for the gunpowder pans.