Berdon is another company that made Star copies, and their tool head also lacks the collar. The Berdon tool head used standard 7/8-14 dies also. Another feature distiquishing a Berdon tool head is that it could be used with either a Star type powder slide housing, or with a standard powder measure. Below the Powder Slide Housing was a ~7/8" unthreaded hole for mounting a standard powder measure. I have a Berdon tool head, and it came with a 1/2" cast iron powder slide housing.
My Berdon is stamped "Berdon" on the tool head between the taper crimp station, and the seating station. Very small letters, and a very light stamp. I only have the head, so I can't compare the rest of the machine.