100-02-25-05-04Ref

The Glashütte Original Senator Perpetual Calendar unites a complex movement with a serene aesthetic. Its caliber 100-02 movement drives the perpetual calendar indications shown through dial apertures, including the signature 'big date' and a leap year indicator beneath the 12 o'clock logo. Reference 100-02-25-05-06 includes a rubber strap with a pin buckle, 100-02-25-05-04 has a rubber strap with a folding clasp, and 100-02-25-05-53 features a rubber strap with a short folding clasp.