Dillon toolhead question

[Poodleshooter]

At a recent auction, I acquired what appear to be a cased Dillon 550 shellplate with locator buttons, and a Dillon toolhead. Is there any way to identify which machine the toolhead fits? The pictures on their site seems to show a similar toolhead for the 550 and 650 as well as possibly other older models.
I don't own any Dillon presses, so I'm trying to sell this stuff off.
I'll try to post pictures later.

 

[Steve Smith]

How many threaded holes in the toolhead? If 4, 550b, if 5, 650b, if 6, 1050b.

 

[Lloyd Smale]

like he said about the tool heads and the shell plate should have a number stamped on it and if you go to dillons web sight they have a chart. If its a 4 hole tool head Id be interested email me at [email protected] with a price

 

[Poodleshooter]

It is a four hole toolhead. Lloyd, I'll try to send you an email this weekend with a picture of the toolhead. I also have a 550 shellplate with locator pins that I'll sell if anyone is interested. It has a tiny patina of rust on one side. I'll try to get a picture of that up too-in the for sale forum of course!
Thanks for the dillon lesson, gentlemen.