Question: Which Built at has a Date of 1946, and a 1947 Nos of 3556/7?
SQL: SELECT "Built at" FROM "2-16263665-1" WHERE "Date" = 1946.0 AND "1947 Nos" = '3556/7';

Question: Which Date has a 1946 Nos of 3156/7?
SQL: SELECT AVG("Date") FROM "2-16263665-1" WHERE "1946 Nos" = '3156/7';

Question: Which Date has a 1947 Nos of 3525-34?
SQL: SELECT COUNT("Date") FROM "2-16263665-1" WHERE "1947 Nos" = '3525-34';

Question: Which 1947 Nos has a BR Nos of 48730-9?
SQL: SELECT "1947 Nos" FROM "2-16263665-1" WHERE "BR Nos" = '48730-9';