OK - just found another one on ebay (photo credit to them [UPDATE: sold for $125.50]) - not as nice as mine but has the packaging. Bids are approaching $100 so somebody must want them. Looks like anything from a Winchester 90, 94, Marlin 92, 93, Savage 99 to a Remington Model 25 may have used this Lyman 6.

[Linked Image]

Here's a link to one on an old Savage:
http://www.savage99.com/rear_sights.htm

Last edited by Gusb; 04/06/15.