Kitchenaid stand mixer and blender are the oldest things I can think of. Probably around 20 years old. If we're not just talking consumer goods, I have a Textr

Kitchenaid stand mixer and blender are the oldest things I can think of. Probably around 20 years old. If we're not just talking consumer goods, I have a Textronix oscilloscope from the 80's that I use occasionally.