100-02-25-05-53

The Glash:utte Original Senator Perpetual Calendar pairs a complicated movement with a serene design. The indications for the perpetual calendar, provided by its caliber 100-02 movement, are all displayed through apertures on the dial, including the signature 'big date' window and the subtle leap year indicator below the logo at 12:00. Reference 100-02-25-05-06 has a rubber strap and a pin buckle. Reference 100-02-25-05-04 has a rubber strap and a folding clasp. Reference 100-02-25-05-53 has a rubber strap and a short folding clasp.