This Knack is a British made razor that falls within a range of razors that were made from the late 60's to mid 80's It a pretty and tall razor at 109 mm high, and it weighs a mere 33 grams. One handed operation is easy as the dial is situated just below the head, simply grip the handle with your three bottom fingers and use your thumb and index finger to twist the dial. The blue plastic handle offers good grip, especially when it is in a nice condition like this one.
The razor is in very good condition with no damage apart from a tiny bit of wear and tear.