You should take the advice given above with a pinch of salt. For 'real' PPLs, nothing less than the new Martin Baker watch by Bremont will suffice, as promoted in the March edition of Pilot magazine. Okay it costs £2,895, but that's a small price to pay to look a proper ......... pilot
Surely, a Breitling - the one with the 121.5 transmitter inside. A Bremont is just a fancy watch but the Breitling demonstrates a proper attitude to aviation safety.