ETERNA. A MENS 18K YELLOW GOLD AUTOMATIC CHRONOGRAPH TRIPLE CALENDAR AND 24 HOURS WRISTWATCH No 55 Model: Matic Reference number: 8401.68 Date: Circa 1990's Movement: Signed, 17-Jewels, Cal. ETA 7750 Dial: Signed, white, gilt applied baton hour markers, black outer 1/5th second division,  black  outer Arabic calendar division, subsidiary dial for chronograph hours at the 6 o'clock position, subsidiary dial for seconds and 24h, subsidiary dial at the 12 o'clock position for chronograph minutes, date and month aperture at the 12 o'clock position, gilt stick hands, gilt centre seconds hand for the chronograph, gilt centre calendar hand with half moon end Case: Signed, brushed and polished 18K yellow gold, snap on gap, No.678840XXXX Strap: Brown leather strap Size: 37mm Weight: Approx.79g