So I did my daily check-and-hope of LotW today and was shocked to see a confirmation from a Botswana station contact made 2 years ago! That was country 255, completing my 2016 DX goal. From the date, it has to be a contact made during the CQ World Wide CW DX Contest.
I think that this was either Neil, VA7DX or Roger, ZS6RJ operating as A25DX.
