the answer of course is - if you plan to restore them all, try them out and see what you like best and keep that. if you only want to restore few, probably it's safer to start from the more famous brands that others mentioned.
Its actually not as bad as the picture looks but its hard to get a clear photo with my iphone.
Sorry it is Christensen and it is brockton Mass and the back says warranted
on the ones i have it seems that the "warranted" models are older and the noonan's are later models.
either way they are nice shavers and take a good edge quickly.