Nice piece. I can see how your "significant other" would be emotionally attached to it.
Troubleshooting these aging pieces can get pretty involved. If you find the right tech, don’t be surprised if there’s 6+ hours of bench time to arrive at a good point -- plus parts. @elliottbnewcombjr ’s offer to check the tubes for you is quite generous, and a no-brainer in my opinion.
We’ve had a few very old pieces (60+ years) old pieces come thru our shop throughout the years. We’ve also found cases where it was impossible, or financially impractical, to service/restore items. (We’ve been known to put alot of time and effort into "high emotional attachment" pieces and "adjust" the labor to about 1/3rd the time we put in).
In those desperate moments (impossible/impractical repair) vs the dumpster, we’ve replaced the vintage components with modern gear. In a recent case, we took an early 60’s piece, replaced the amp(s) with modern Class D amps and replaced the old Garrard changer with a newer (used) BIC record changer. The new amp had Bluetooth on board and aux inputs for other devices. An inexpensive streamer will allow for apps such as TuneIn for AM/FM programs, and other music services. The BIC changer has magnetic cartridge delivered via (moderately-priced) outboard phono stage to the amp. The speakers appear to be "okay" per your description, so they may by fine as is. Some of these new digital amps have outboard controls via ribbon cable. We were able to mount the volume control in the stock location and use the OEM knob to adjust volume. Speaking of volume, it can be adjusted via remote control or app on your phone/tablet. Another strong consideration here is the person doing the modification may not need the entire piece of furniture. Just the internals so that the new can be integrated with the old as unobtrusively as possible. So, shipping logistics are minimal.
As mentioned, repairing the original piece would be my first option. But, there is a "Plan B" if you love the piece, and want reliable, high(er) performance sound, and flexibility.