Hi OM Allen,
Broadly, steampunk is a culture based on an imaginary visualization of the future by a person in the ‘steam age’ (when steam engines ruled).
For us in ham radio, homebrewing equipment for today using vintage technology / vintage parts is steampunk. Years ago steampunk became the rule when the only source of cheap parts for us was WWII surplus.
I consider this RF Milliammeter steampunk because of its looks and construction. If you could spare the time, you may go through my blog and decide which of my other projects are also steampunk!
Here’s the link. http://nandustips.blogspot.com/