Its probably the sapphire sandwich model which is around £500 more than the Hesalite (plastic) crystal std model. Both are manual wind not auto. It isn't difficult to tell with a display back. Does it have a rotor? No? Man wind. The lack of bracelet may be an issue if he changes his mind as to buy it later is v expensive, circa £500 wheras when new the bracelet model is only about £100 more than the leather strap one.