Stig, I've only run across one, now in the TLC of the honorable roughkype. It had a thumbnotch, took a wonderful edge and gave a wonderful shave. With some loving, I don't see why that one couldn't do likewise.

The fact that its an ancestor's blade would justify some extra care. For my own blades, I generally do my own resto. For an ancestor's blade, I'd probably want professional care, depending on its needs. There are many Vom Cleffs, but only one that belonged to your great grandfather. 'Hope you get to enjoy it.