Irony

There was an irony with yesterday’s blip.
 
Back in February I blipped some ¼ inch UNC nuts that I had bought to make use of an old camera mount that we needed for the trail cams. 
 
A couple of days ago I found that I had a spare/second identical mount - heaven knows where they both came from??.
 
Whatever, I’ve scraped together two days blips from them - well three really . . .
 
Well done to those that got close to yesterday’s  ‘Can you guess what it is ?’.