With an etch like I've never seen before and the Philips base!
I THINK this is the only surviving bulb from a lot of them I got from a friend's house that converted to nothing but CFLs. The rest of the bulbs, I used up.
What does the etch look like? I have a few lamps in my house that have a different etch too. The word "Sylvania" is in italics in the center of the lamp. The 60W ones are double lifes and the 90W ones are "supersavers".