This particular cap was used for a very short time and may even be a manufacturing fluke, they are almost identical to the late '50s white chicklet cap, but a little skinnier and have a wider foil band. They appear most often in late 1957 and early 1958, just after the brown Chiclets ran out. The Luxe reproductions are handmade with 2 very small, parallel .047/100v Vitamin Q type caps (equaling .1mfd). They are fragile, so you have to go easy with the soldering iron, but they are the very same size as the original caps.  Sold as a single capacitor.