Dunno if Victoria had a "house style" but according to the manual on the U2 – V2 series there are a pair of ring style locking nuts with slots around the edges on each side of the bush that the dial runs on. Small one on the outside let into the dial. Large one on the inside pulling up against the screw bearing on one side (right?) and against a shoulder on the screw on the other side.

Need a pair of tube spanners with appropriate projections to deal with the nuts.

Its about 30 years since I had any involvement with disassembling a Victoria mill but the pictures in the manual I have more or less agree with my memories of the job. Lots of crud to dig out to unveil the outer "nut".

My, very rough, copy of the book just shows a simple single sided handle clamped onto the square end of the leadscrew. The one I helped with had a proper balanced handle held on by a screw down the middle.

Clive