The "921" is a shape exclusive to Savinelli's Churchwardens, essentially a smaller version of the "920 KS"; a little slimmer, a fair bit shorter from heel to rim, but every bit as dynamic in line and style.
There once was a blend so divine, Irish Creme, with a flavor so fine. With a hint of sweet cream, It’s a smoker’s dream, A delight in each puff, so sublime.