From Skennertons Identification series
Interwar LithgowProduction (Fiscal year)
1919-20 = 25,570
1921-22 = 14,440
1922-23 = 2,700
1923-24 = 3,320
1924-25 = 3,140
1925-26 = 2,760
1926-27 = 3,000
1927-28 = 3,200
1928-29 = 3,200
1929-30 = 340
1934-35 = 500
1935-36 = 1,141
1936-37 = 900
1937-38 = 421
1938-39 = 860