Also received this eQSL from Harmony on 27 April. I can confirm this is a picture of their monopole TX antenna somewhere in Ireland. It is quite conspicious in my opinion.
Harmony stopped broadcasting from saturday morning, 28 April 2018 and has not been on air since then ....
.... looks like we got our eQSL just in time!
Update: Spoke too soon, 05 May 2018 Harmony back on the air after a week of airwave silence.