I recently purchased a Record bench vise labeled as SQ5. It has 5 inch wide jaws, a small anvil behind the fixed jaw, cast in (fixed) pipe jaws below the standard ones and a non-swivel base.
It is unused although its manufacture must have been several years earlier…
There is a small pictorial on the moving jaw that shows how to open the jaws: turn the screw 360 degrees and pull the moveable jaw outwards – a quick release. To tighten is the reverse (I am guessing here as the other pictorial, if any were present,is missing): close the vise until the jaws and work are in contact and then turn the screw to achieve a firm grip?
If only it worked! Sometimes it does but usually it is a fiddle around, jiggle this, etc. Both opening and closing are frustrating. Once closed it grips securely. Not much to see underneath; it is fairly well enclosed by the casting. Screw has visible grease.
Any hints, thoughts, appreciated.