Silver SR101 ribber is an attachment that converts vintage knitting machines, Silver SK101, SK102 and SK103, Studio SK102, SK106, SK105, SK106, etc. (all models are very similar) to a double bed knitting machine capable of alternating/knitting purl and knit stitches.

The carriage handle is a round knob-like and the weights are also vintage-like: not round like barrels, but like a squished barrels. The manual for the Silver SR101 ribber is available online for free (Just search for it).