I just got this last week. Measures in pounds and kilograms. Has an adjuster knob. Appears to work fine.

Pointless to make the ckicky as it is the last one on ebay.co.uk. Just copy and paste.

http://www.ebay.co.uk/itm/White-Retro-130kg-20st-Mechanical-Bathroom-Weighing-Scales-Non-Slip-Finish-/121093080037