CREATE TABLE "1874_1898" (
  "class" text,
  "wheel_arrangement" text,
  "lcdr_number_s" text,
  "secr_numbers" text,
  "manufacturer" text,
  "year_made" text,
  "quantity_made" text,
  "quantity_preserved" text,
  "year_s_withdrawn" text
);

Question: Which SECR numbers have a class of b1?
SQL: SELECT "secr_numbers" FROM "1874_1898" WHERE "class"='b1';

Question: Which class was made in 1880?
SQL: SELECT "class" FROM "1874_1898" WHERE "year_made"='1880';