Slovak rock group. Formed in 1963 as “The Jets” (English for “Prúdy”) by Pavol Hammel. The first Slovak rock group to have an LP album released: “Zvoňte, Zvonky” in 1969. In the 1970s the group morphed into being more of Hammel’s “trademark” for his backing band with ever changing line-ups; for instance, in the late 1970s the line-up was nearly identical to Fermáta.