I still have one of those on my 440. It has been a great distributor , ever since the 70's like someone else mentioned. They weren't very expensive back then , I got mine in an Electronic Ignition conversion kit that Direct Connection had,it was one step up from the one they list even today.They haven't carried it in years as far as I know. Judging from the condition yours looks to be in, rusty and looks like the wiring harness may be damaged??? I'd guess it's not worth anything. But then thats my