P. S. Bruce, On this site is shown an example of one from 1942.http://www.gordonmumford.com/m-navy/radio-01.htm At that date, they were issued by the Postmaster General. Regards,Adi   From: Bruce Dodd via <mariners@rootsweb.com> To: MARINERS@rootsweb.com Sent: Wednesday, August 5, 2015 6:52 PM Subject: [MAR] Telegraphers' tickets  ....Can someone suggest, please, where I might look for Radio/Telegraphers' tickets? Assuming, of course, that there are such things, authorized by some (which?) authority. The cousin in question sailed afaik with Union-Castle, London Overseas Freighters, and Sea-Link.