I just got this vintage Wilkinson Sword Sticky. It’s in marvelous condition. I do have a few questions about the blades that I got with it. They’re WS Super Sword Edge blades in NOS condition. Does anyone have any info on these blades? How old do you think this packet of blades is? Have you ever shaved with these blades and if so; how do they shave? Would you recommend me shaving with one of these blades so long as there’s no rust or other problems?