Union Glashütte UNG-25.S1

The UNG-25.S1 is an automatic chronograph movement manufactured by Union Glashütte. It measures 30mm in diameter and 7.9mm thick, operates at 28,800 vph with a 65-hour power reserve, and contains 27 jewels. Based on the Valjoux 7750, it features a silicon balance spring and combines day, month, moon phase, and 24-hour indications with a chronograph. The movement is currently in production and powers the Belisar Chronograph.