Foto van legitimatiebewijs (Ausweis) van kapitein H. Lentz als lid net regelingsbureau Westfront "Vesting Holland" H.M.T. "Seedorf" H.M.T. Seedorf Field service pocket book. Part I : Discipline, office work, pay, and burial parties - Engeland Voorschrift, 26/GS Publications/863 signal training pamphlet Maintenance of signal equipment in the field wo Courses of instruction defence specification Defence specification for the use of government departmenets DEF-6 Stop watch, 1/10 second generl service (Pocket Timer) wo User handbook for wireless sender CII / published under the authority of the Signal Officer-in-chief, the War Office, Whitehall S.W.1. wo User handbook for reception set R 210 / published under the authority of the Signal Officer-in-chief, the War Office defence specification Defence specification DEF-5132 Capacitors, fixed, mica dielectric Portretfoto van H.M.P.J. Kessels als 1e luitenant Portretfoto van H.M.P.J. Kessels als 1e luitenant, zittend op een stoel