Spring Bar Tool - Steel Material:Steel both of which were lost

both of which were lost in the third generation

5970 Perpetual Calendar Chronograph

the Ruthenium Collection was a final send-off to brass movements and one of very few individually numbered limited productions

Touches like a bevelled sapphire crystal

Spring Bar Tool - Steel Material:Steel both of which were lostThe Hairspring Spring Bar Tool, fabricated in Switzerland by Bergeon, features fork and pusher working ends to accommodate strap changes for both drilled and blind tapped lugs. This quality steel tool displays fine Swiss design and manufacturing with expertly turned knurling that provides exceptional grip, precise machining and finishing throughout, and a laser engraved "Hairspring" logo. Bergeon is the leading manufacturer of watch tools, crafting