His Majesty's Stationary Office (HMSO) Catalogue - 'Series

Name	Silhouettes of Aircraft
Description	A set of items used for the identification of aircraft of relevance to the Royal Observer Core.
Departments	Ministry of Home Security

Name	Silhouettes of British Aircraft. [11/40]
Category	Air Reference
Issued By	Air Ministry
Issued For	Ministry Of Home Security
Published	Nov/1940 print run = 25,000 info = (53427) Wt.2376A 25,000 11/40 Hw.
Published by	His Majesty's Stationary Office

Name	Silhouettes of German Aircraft. [11/40]
Category	Air Reference
Issued By	Air Ministry
Issued For	Ministry Of Home Security
Published	Nov/1940 print run = 25,000 info = (53428) Wt.2376A 25,000 11/40 Hw.
Published by	His Majesty's Stationary Office

Name	Silhouettes of Italian Aircraft. [11/40]
Category	Air Reference
Issued By	Air Ministry
Issued For	Ministry Of Home Security
Published	Nov/1940 print run = 25,000 info = (53605) Wt.2478 25,000 11/40 Hw.
Published by	His Majesty's Stationary Office