Hello AusAnzani, Blue,& ton66

First, thanks to AusAnzani for assisting here. Really appreciated.
We now have an opinion from an expert in this area.
We also have Peter Hunn (author) lending support by the reference.
We have Blue adding the colour and styling evidence.

So ton66, nothing conclusive, but more likely than not.
Photographic or other visual evidence would be conclusive.

Hope this helps.
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JACK.