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.
The Czech tool is most likely the most popular pipe tool in the world. It features all the regular tools a pipe smoker requires in a durable and well-made format. As the name suggests, these tools have always been made in the Czech Republic.