Using a vintage button bulb saver be used for CFL or halogen lamps?
Your diode type bulb saver is just a halfwave rectifier .It will not be good on a CFL .Half wave rectifiers like this draw DC  current of the AC mains and lots of harmonics of even and   odd order                .The power Authoraties in most countries will not permit this these days .Do keep your antiques because they represent a bygone era and the NTC      thermistor ones could be useful because they do reduce inrush current  .