Lovely catch!
Aside from what we know about the Streamline, that it was made in the 1950s and packaged in a number of guises, I don't have a great deal more to say. Naturally, the 'New Chromium Strop Outfit' moniker doesn't apply here as it's gold.
It was a thing ...
I've seen just one before and at the time wondered if it had been plated by a collector. Never say never, when it comes to vintage razors. I'm inclined to believe these were plated from the off, likely as a limited run and perhaps as a special for the launch. Notice the lettering on the case is also gold filled?