Zenith El Primero Stainless Steel Chronograph Day-Date Month Jump Hour Moonphase strap watch. The model number of this Zenith is 01 0240 410. The case is stainless steel featuring a textured white dial with three subsidiary registers and moonphase. The case measures 40mm in diameter. This Zenith is accompanied by a Zenith strap and double deployant clasp. This Zenith has a exhibition caseback displaying the 410Z caliber and Zenith rotor. The rotor is stamped "ZENITH EL PRIMERO SWISS MADE MANUFACTURE LE LOCLE". The movement is signed "THIRTY-ONE JEWELS 410Z". Condition: (Excellent).