It was the the earlier model with the E clips on the linkage. Finally gave out making it run out of allignment. Called Dillon and as soon as I said E clips they said send it to us.
Today was a sad day at the reloading press. My Dillon 550 finally crapped out at about 25 yrs old. So I've had to remove it from the strong mount and prep it for its return trip to Dillon. Sad day!
I send it to. My buddies place across town. He charged me a penny a piece. Cleans it in stainless steel pins and a mix of something. Over the years probably be cheaper to have bought a setup to do it myself but I don't want to.