This handsome young gentleman (only identified as C.H.P.) has a twinkle in his eyes as if none of life’s negativity had yet to darken his soul, but this photo most likely dates to around the Great War. His hair is swept up too; it remains conservative but just a bit different, as any youth would attempt to be.
His breast pocket with the buttons is an interesting detail. With his ample cut suit and collared shirt I’d date this excellent portrait to be from the mid to late 1910’s.