The counterfeiting unit continued under Langer before he left in early 1942 at which point it closed down; he later stated that over 18 months, the unit had produced around £3 million in forged notes; the historian Anthony Pirie puts the figure at £500,000.
Unit pemalsuan tersebut berlanjut di bawah naungan Langer sebelum ia hengkang pada awal 1942 saat unit tersebut ditutup; ia kemudian mengklaim bahwa sepanjang 18 bulan, unit tersebut telah memproduksi sekitar £3 juta uang palsu, meskipun sejarawan Anthony Pirie menyebut angka £500,000.