Blue faceted jewel with nickel plated threaded collar. Yes, these will fit your ancient (or newer reissue...) Showman, Bassman, Pro Reverb, Super Reverb, Bandmaster, Champ, Vibro Champ, Deluxe, Vibrolux, Tremolux, Harvard, Princeton etc. exactly. We also include a new #47 6.3V pilot light bulb; if you don't need one now you'll need it someday. Brand New. Genuine Fender 0990949000. UPC 717669500672.