Audio Museum...what would you want?

Started collecting pieces for my museum about 7 years ago.
The pieces must have had some technological impact or caused a change in direction of audio to qualify. (this is of course opinon). So far:
A restored Edison cylinder player, A restored "flat disc" player, a Scott FM tuner, a couple early Marantz receivers (gyro-tunes!), Pioneer RT-909 reel to reel, Phase Linear 700b amp & C-4000 preamp, AR turntable, Dalquist DQ-10's,
Technics Linear tracking tableand my pride and joy, a 1957
Grundig "Majestik" console with turntable, reel to reel,
incredible tuner, a rotory knob 5 band E.Q., 3 push button E.Q. settings (the first DSP!), and electrostatic tweeter panels! Koss Pro 4AAA headphones too. In time I hope to add a pristine high end grammaphone (sp?), black widow tone arm, G.A.S. Ampzilla, AudioPulse time delay, Neumann mic,
Garrard Zero 100, Harmon Kardon 4000 casstte,and a few other pieces that will hopefully pass my way. Best of luck to you in your efforts!

I must be getting old. All these that have been mentioned are either more recent or more exotic than I think of as museum pieces. I would start with a Fisher amp or receiver. Maybe an H.H.Scott kit or DynaKit amp. A Dual or Garrard multi-play turntable or the single-play AR. A Shure V-15 cartridge. Altec Voice of the Theater speakers. Maybe an old Tandberg reel to reel.

I guess that I am older than I thought, a pair of original quad 57s, REL tunner ca1950, a Marantz model 2, and for a small system a pair of orriginal LS3/5a BBC monitors. I have a pair of Mac30s, and C-8s.
Happy listening

Some great suggestions here! I, too, have owned Koss Pro-4AA, the Phase Linear 4000 preamp and Dynakits. I used to lust after JBL L-100s. Keep those posts coming....what's the one thing you've parted with that you wish you could have back for old time's sake?

I kept my Empire 598, but it's in a box in the garage. Even found a replacement belt for it; still works great... But sold off the Empire 999 cartridge (couldn't afford the 1000) long long ago.
Have a Fisher tuner kit (KM-60) I built in '68, still works. Finally found my original s/s amp, an Eico 3070 kit, in working order earlier this year. First speakers re-gained also--AR4x ...how many of you also started with these and lusted for the 3a's?? Definitely museum pieces.