Another oddity for yo [upl-image-preview url=//i.imgur.com/eqFyrwU.jpeg]

@"Elcarajillo"#p13114 Rotary slide rule. :-)

@"DavecUK"#p13124 I can see where you are coming from, very similar appearance.

What is it / used for ?

Another oddity for yo

Elcarajillo Rotary slide rule. :-)

Norbar click stop torque wrench…. circa 1960

DavecUK I can see where you are coming from, very similar appearance.

i know, but i cheated so wont say haha

Yes rotary slide rule