Oldest movie you routinely watch

[JMS1223]

I thought it would be interesting to hear what the oldest movie is that you routinely watch (can be on a once a year basis, once a month, once every few months etc.). The movie must be a feature film and be something currently available on DVD/Blu-ray/4K etc. and be watched in its entirety when you watch it.

Also include how often you watch it.

For me that film would be To Kill A Mockingbird (1962). I watch it once a year. I also watch Casablanca (1942) and The Wizard of Oz (1939) but not on a routine basis, as I watch them randomly when the mood hits (usually once every few years).