My current Philips heads are blunt and, stupid as it sounds, its cheaper to buy a new shaver.
I haven't a clue about this model - I don't even know if its rechargeable - it may be electric only!? It's obviously an old model. Couldn't resist the price. And -9% with Quidco.
Free P&P until November 16th
EDIT. I think the picture is wrong at Superdrug. Anyway as far as I can see it IS rechargeable but "charging time: 8 hour(s) and shaving time: 25 Min(s)"
It is also washable, which is nice :-)
EDIT2. If the picture is CORRECT then the model is HQ7120. Which is an 8-hour rechargeable shaver (CANNOT USE FROM THE MAINS ONLY) and is washable.
Not available anywhere else, so definately a rather old model.