How to remove knob on Lockwood Entrace handle set
I've been attempting to take the keyed knob off an ornate Lockwood entrance set with no visible screws. I've found the little slot in the knob that I think I am supposed to locate a tab to depress by partially rotating the knob. (This worked previously on some internal Gainsborough passage sets that I removed successfully.). However I can't actually seem to find anything to depress on the Lockwood handle. There is no obvious tab to push on, although there is an indentation that appears under the little visible hole, but pushing into that with a small flat head screwdriver doesn't seem to do anything.
Anybody here that has taken one of these handles off before and sort of understands what I'm talking about? Can you share the secret of how to disengage the knob so I can take it out to be rekeyed? My attempts at internet searches don't seem to locate any method other than push down on a tab to release these sorts of handles.