Not strictly the oldest in my collection by age alone (1967), but it is the oldest in so far as being the first record I can remember listening to (on my old man’s gramophone cabinet) and the first that I added to my own collection (I essentially pilfered it from my old man’s collection due to how often I listened to it).
This record introduced me to Gershwin as a child and played a big part in my musical journey, opened my ears up to new auditory worlds, was a gateway to discovering all the great composers that came before him and cemented my lifelong love for orchestral music.
It also has sentimental value to me as it connects me to memories of my father and serves as a reminder that even people that are vastly different to each other can often find a common bond through music!