They were always very neat applying their Phosphor were Philips, all other manufacturers had a feathered edge where it ended.

It's because they used to coat the entire bulb, and then scrape the neck area clean afterwards. Most manufacturers started out this way, if you look at lamps which are old enough. The process is wasteful of the very expensive phosphor coatings though, because you throw away what is scraped off, so improved techniques were later developed which only put the coating where it's needed. Due to the limitations of those processes, its true that the edge is no longer so cleanly defined. I don't believe that Philips in Hamilton ever upgraded to those more modern processes.

Interesting, I did wonder how it was done, I`ve also just noticed my French Sylvania 50watts are the same

Etch looks darker on the one I have Andy.... but the date codes are the same. What wrapping did it come in?

It came in the same style wrapping but the paper was in tatters. Philips lamps have always been first class quality but the only gripe I have is that Philips etches do wear off a lot over the years especially on the fluorescent tubes.