I remind you, the GLASGOW handstruck remains unidentified
You were well intrigued by your two examples,
They have been a challenge.
As an example of collaboration, our member "PostmasterGS"
very generously donated his time and expertise, to OCR
a Scots monograph I have in my Library.
With just one click, I find there is no existant Postmark to 1860
with text string IXO in the hammer.
That is amongst 1000's of Scot Postmarks, and possibly 200! Glasgow, Sub Post Offices.
Only Post offices with an "X" were LENNOXTOWN and ST ROLLOX
It's not often we cannot crack a postmark!