The Duograph Chrono Klassik

From Guinand -

Courtesy of Guinand

Here are the pertinents -

Movement

• Calibre Valjoux 7750 / SW500
• Self-winding mechanical movement
• Chronograph function integrated into the movement
• 25 jewels
• 28.800 vibrations per hour; 4 Hz.
• Stone lever escapement
• Stop-second
• Glucydur Balance Wheel
• Shock resistant as per DIN 8308
• Anti-magnetic as per DIN 8309/ISO 764
• Movement diameter 13 1/4"" (30,4 mm)
• Incabloc shock protection
• Unidirectional self-winding mechanism with ball bearing, weight segment made of heavy metal
• Power reserve approx. 48 hours
• Movement decorated, blued screws, weight segment with engraved Guinand logo

Functions

• Hours, minutes
• Chronograph with 30 min- and 12 hours counters and central second hand
• Date- and day of the week display

Case

• Case made of stainless steel, polished
• Sapphire crystal glass, domed, anti-reflective on the interior
• Screwed back with sapphire crystal glass
• Screwed crown, double O-ring sealed
• Pilot bezel, rotatable in two directions
• Protected pushers
• Pressure resistant up to 20 bar

Dimensions and Weight

• Case diameter: 40.6 mm
• Case thickness: 15.2 mm
• Band lug width: 20 mm
• Lug-to-lug distance: 48.4 mm / 1.91 inch
• Weight without strap: 85 grams