Recently acquired another Anniversary model, that came with an HR-style solenoid installed, though it has no logo on it. It has a bi-post connector, but the pins are much fatter than the usual variety -- certainly too big for any of the stock plugs I have.

Anyone know what these are? Is there a special name for them, and if you've dealt with them, was Paramount able to help?

Paramount can make up cords for the Sol/King Sol/HR-style solonoids. Just tell them what you need.
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Officially the twin posts on shutters were called ASA Bi-post as it was a standard. The Graflex style of fork-on-the-cable and the Heiland Research style of short fat pins were proprietary, so there's no real name for them other than "Graflex solenoid cord" or "Heiland solenoid cord"

Les