Topic: How was this hourglass made?

[Frank]

It really is simple and anyone could make them with a few years full-time training.

But I doubt hole is made with bit of wire! Central hole joining two bulbs is formed in shaping to the correct size, I guess it is possible to use a tool of the appropriate diameter to fix the hole size... but I don't 'know', if so some internal flattening may show. Hole for filling at one end would be made with an appropriate tool, probably leaving a raised lip to be folded down for sealing after filling. This one probably had the hole made at the end opposite the punty whereas a lampwork one would still have tube at blowing end and filling done from there.