Thanks for the lead, Ami. Let me share what I've found.
Turns out the Weatherby Imperial scopes were made about 1964-73 by Hertel & Reuss, a high-end optical manufacturer then of Kassel and now out of the scope business. The Hertel & Reuss name continues not as an independent company but as a trade name owned and used by a successor company. They finish opera glasses in Marburg an der Lahn. https://de.wikipedia.org/wiki/Hertel_%26_Reuss Other, later Weatherby scopes were made in Japan (not that that's necessarily a bad thing).
The Imperials share with my Carl Zeiss a similar arrangement of knobs. Interestingly, the ocular-end knob is for focusing. The objective-end knob controls both traverse and elevation. That knob has 2 concentric dials, one for traverse and the other for elevation. The inner knob appears to want a special tool (naturally). I have not yet found instructions anywhere, especially for which direction of the knob moves impact which way.
So, it seems adjusting the load and my shooting might be easier and more reliable than trying to (a) find a special tool and (b) guesstimate how many clicks and which way....
Last edited by Dave in Maine; 09/27/16 05:18 AM.