The Maserati 4cl's minimum no was?
CREATE TABLE "table1_21977627_1" (
  "no" real,
  "driver" text,
  "entrant" text,
  "constructor" text,
  "chassis" text,
  "engine" text
);
SELECT MIN("no") FROM "table1_21977627_1" WHERE "chassis"='Maserati 4CL';