Hello all,

Currently I have an old touring Trek that was handed down to my by my dad that is about 35 years old. I'm pretty sure its rear derailleur is the original. I was changing the tubes on my back tire and while putting it back on, I somehow snapped the rear derailleur in half.

My question is, what would be a compatible replacement? The current one was a SunTour Cyclone Mark-II (3500).

Thanks!