Silver SK321 knitting machine appeared on the market in 1972. It is a standard-gauge knitting machine (which means the needles are 4.5 mm apart) with 200 needles. It is identical to the Singer MemoMatic 321 knitting machine, which I already described in detail in my other post.

Silver SK321 features a flat metal bed with 200 needles, located 4.5 mm apart, which makes this machine standard gauge. It also has a punch-card reading mechanism for advanced and “automatic” patterning using tuck, slip, and fair isle. This mechanism accepts 24-hole cards. The pattern from the punch card is transferred to the pattering drums, which then establish the selection of the corresponding needles through the intricate mechanism of the carriage.

Even the later model (just by one number, Silver SK322) already has a built-in knit leader and a built-in tool tray.

Additionally, this model still has only one lever on the pattern panel: only to release the punchcard so it advances when the machine knits patterns and is passed back and forth. Later models have two levers: one for card release and one to expand the pattern vertically by a factor of two.