Don’t remember offhand, but it was something simple like “ANC-1“ or something like that.
I misspoke above by calling it a “wide tip” arm. I meant to indicate that they were flat and wide and snap on, but they were a narrower version than the more common type you saw on old cars at the time.
You can actually see them (with blades) on our website. Part number is 5324 in silver and 5329 in black.
The visible round section near the tip can be rotated to change the blade angle. Not seen under the adjacent wide section, is a lock lever that you can release to extend or retract the arm.
These allow you to make little changes to whatever length and angle you feel is most appropriate for your set up.
When I bought mine, they actually came with plastic adapters to go from the narrow tip to the more standard wide tip. But the adapters started becoming like hens teeth, so blades with narrow clamps are better suited.
What we sell is the same arm (although also available in black) with blades that snap directly onto them without the need for adapters. That may limit your blade choices somewhat, but doesn’t almost eliminate them like the originals did.
This didn’t actually start out as a plug, but then I remembered that Jim brought these in a few years ago.