Mechanical Movement - Automatic Categories: All Sea Scout 1970's 18k 1940's Tiffany Tank Watch Sport 1950's Gyromatic Bumper Automatic Chronograph Dress Watch Girard Perregaux Mechanical Movement - Automatic Mechanical Movement - Manual Military Watch All / Mechanical Movement - Automatic GP-005: 1950's GIRARD PERREGAUX Gyromatic Automatic Watch $1,650.00 GP-015: 1950's GIRARD PERREGAUX Gyromatic Automatic Watch w/ ETA cal 1256 Movement $1,650.00 GP-026: 1940's GIRARD PERREGAUX Sea Scout Military Watch w/ Automatic Bumper Movement - Very Rare $2,650.00 GP-027: 1950's GIRRARD PERREGAUX Gyromatic Watch w/ Bumper Automatic Movement $1,650.00 GP-028: 1950's Girard Perregaux Gyromatic Automatic Bumper Watch Ref #6170 $1,650.00