Knowledgeable for sure, but I guess we will only know for certain if someone comes up with a dated letter head or contact of employment.

Would a period advert do?
http://www.flightglobal.com/PDFArchive/View/1940/1940%20-%202875.html

I had to double check this for a piece just going off for publication and I had it down as “department” until I saw this thread. Thanks

Allan