The aged and dirty colours of the gauge are beautiful Julian and it has the perfect background/environment to sit with. Love it.
The second image reveals itself as follows on my screen; four out of focus spokes visible, the one on the right more so than the others. I was wondering if there is another spoke at the bottom which is invisible. The centre red knob has a little burn out at top (say at ten past). It has uneven light and becomes darker towards bottom; very dark at say (twenty five to). As you were wondering how we see it I thought I would outline what I see.
I use 24inch apple mac display. I have never needed to callibrate it and have good representative prints from the screen without callibration. I'm thankful for this because when you enter into the impossible jungle of colour management it, for me, leads to stress and unnecessary trouble and saves me from drowning in the sludge that resides in the bowels of Photoshop
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However your image works well in the context of the first one. On it's own maybe I would like to see more.