The erasers here aren’t original—they are from a Faber-Castell 7041-20 natural rubber eraser that I cut and sanded to fit. Since it’s two-sided I think I’ll try fitting one end with a different type, perhaps vinyl or foam. At least in the beginning, there was a dedicated Van Dyke eraser available as a refill:
The 1085 is similar in width to the BT1 and 2095 from Germany:
But they differ greatly in terms of thickness:
The 1085 is nearly three times thicker than the BT1, making it much more substantial in terms of weight, too.
It’s likely that there were many models of the double-clamp eraser. In fact I’ve seen one that has an eraser on only one end—the other is closed off, capped in metal—and another with a vinyl brush at one end. Perhaps then the German versions were akin to a “slim” series, similar to their round erasers, made for typists or some other specific consumer.
The size and shape of the 1085 make it very handy, especially for music and writing; you can get into some pretty tight areas. And it’s not too difficult to shape your own choice of eraser to fit—too bad something like this (Slendy notwithstanding) isn’t still being made today.