They're both MH, John.
The problem is that they're tiny - and when photographed and blown up, they look
more like a different tool and the first one starts to look a bit Dobson-ish - it also looks as if it's been done with a ruler underneath it.
Do you know exactly what sorts of tools MH did use?
I thought a diamond point pen was simply that - a pen, with a diamond tip. I've seen and used these in art classes.
And now you mention vibro-pen with diamond point - do we know if MH had one of these?
That would make sense for the neater of the medium thick broken lines found...
(in both Mdina and IoWSG)
although they do appear (to me) to be similar lines to tohose found on dremmelled fake sigs in general
and what sort of tool would be making the very thick vibrating lines which seem to go from side to side?
Are we setting ourselves up for having to have a major discussion with bits in our mitts in November?