I'm after a little help again...

Does anyone have a Midland Gun Company marked air rifle (the so called Demon) in their collection alongside an example of a 1920s/30s Diana 27?

If you do and are mechanically minded enough to be able to tell the difference, can you compare screw threads to see if they are Imperial or Metric? I have been told the Midland has Imperial threads and the Diana Metric but do not have access to a contemporary Diana to check (nor am I in any sense of the word a competent engineer!)

Many thanks,

John