Just restored to good working condition...
Répétition Minutes & Chronograph Girard-Perregaux, Chaux-de-Fonds, Répétition a Minutes Chronographe, No. 299127. Made circa 1910. Fine, large, minute-repeating, hunting-cased, keyless 18K gold pocket watch with chronograph.
View clockwork at
www.youtube.com hoengsoon#p/a/u/1/6Y10tczCOog