What is the lowest quantity for GWR Nos. 696, 779, 93 5 from the manufacturer Peckett and Sons?
CREATE TABLE "powlesland_and_mason" (
  "manufacturer" text,
  "type" text,
  "quantity" real,
  "p_m_nos" text,
  "gwr_nos" text
);
SELECT MIN("quantity") FROM "powlesland_and_mason" WHERE "manufacturer"='peckett and sons' AND "gwr_nos"='696, 779, 93 5';