Gent's stainless steel Omega Speedmaster automatic split chronograph with black carbon fibre dial, model 3540.50.00. In fine condition with both boxes, instructions ( thank goodness ! ) and UK warranty cards from Beaverbrooks dated August 2004. Service at Omega in Switzerland was completed in March 2011. Look at the price of similar NEW Omega chronographs and you'll realise what a bargain this is !