Precision in the New Forest

We stopped at Burley in the New Forest on our travels. Precision on a measured scale is supposed to be +/- half a scale division on a scale. That would mean a precision of +/- half a minute for the minute hand. But that depends on the mechanism. I didn't watch this clock for long enough but some similar clocks have a mechanism that jolts the minute hand forward at the end of every minute. It isn't a smooth motion. A clock that jolts the hand forward like that has more in common with a digital measuring instrument. In that case we'd only be able to say +/- 1 minute.