I think they're worth it and you'll have it for years to come.
I believe silver face is 70's only (after CBS bought out fender or whatever it was that happened), if you can afford a 60's black face go for that, the sound is unreal.
By 1968 deluxes usually left with CTS/EMINANCE speakers (Jensen had closed down) Once in awhile you can see the EIA code, CTS-starts with a #137-sometimes these are under the doughnut fender speaker label.
Dating system for transformers works on the speakers also.
The vibro is cool but oddly enough I actually find the vibro on my modern Vox to be beefier and more hypnotic. Nonetheless, it's a great little amp and certainly worth 0. The reason the "vibrato" on the Vox sounds more complex is because it IS more complex.Use the contact form on the right at the top of the page to send me pictures and a quick description of your amp. I’m looking to buy vintage Fender Deluxe and Deluxe Reverb amps, Fender Bassman amps, Fender Princeton and Princeton Reverb amps, and Fender Vibrolux and Vibrolux Reverb amps, Fender Twin and Twin Reverb amps, Fender Harvard amps, Fender Champ and Vibrochamp amps, Fender Vibroverb amps and more.I like to buy vintage amps that are clean and haven’t been beat up too bad.The only good thing about dating amps this way is Fender never deviated-still valid today. If your JBL says D120F on it(look for the “f”) certainly could have been stock.I use this before buying a amp always-check all four transformers-will tell you if there has been problems along the way. On the bottom lower corner of the grill cloth was/is a 1×2 inch “JBL” plastic logo that Fender attached.Do you have a classic Fender guitar or amplifier for sale?