This is a rare and unique quartz watch with a display back featuring multiple complications, including the phase of the moon, date, and solstices/equinoxes. The watch face is in French and the case is stainless steel with two-tone gold plating.

• Size: 28mm diameter
• Case material: Stainless steel with decorative gold plating

This is a vintage ladies two-tone Girard-Perregaux Equation Espace, dating to the mid-1980s. It features a quartz movement with a display back and displays time, moon phase, date, solstices, and equinoxes.

• Case size: 28mm
• Material: stainless steel with gold plating
• Dial language: French

This is a 28mm vintage ladies two-tone Girard-Perregaux Equation Espace, a quartz watch with a display back that features the time, phase of the moon, date, solstices, and equinoxes. It has a stainless steel case with decorative gold plating in outstanding condition.

• Case material: Stainless steel with gold plating
• Movement type: Quartz
• Language: French