Image Details: ‘counter on a zipper’ by pinprick, via Flickr
The knitting row counter is a device for keeping tally of how many rows have been completed when hand knitting. It can also be used to track the number of increases and decreases made during a pattern. The first on-needle knitting row counters were seen in the UK the 1920s, when complex patterns for recreational knitting became widely available. Originally manufactured from bakelite and later plastic, this type of counter is still in widespread popular use today (see picture above).