For the manufacture of such watches, the author took two incandescent lamps of 200 watts each (you can blown)
ferrite core
small neodymium magnet
brass coupling (coupling size suitable in size with lamp base.)
First, the author took the bulbs and removed everything superfluous from them,
after he removed the base, he bit off a piece of a protruding glass tube with side cutters.
To extract the inside of the light bulb, the author turned the edge on sandpaper
and pulled the inside out,
gently squeezing the contacts holding tungsten. (The author did the same procedure with the second light bulb)
Then he set about making a funnel through which magnetic sand powder would wake up. To do this, the author took a glass tube, carefully and slowly heated it on the burner
and when the glass warmed up a little stretched it.
I got such a funnel.
Next, the author is this place
well missed with hot glue
he cut off the excess edges of the tube in such a way that hot glue serves as a body and material for fastening, as a result he got such a funnel.
With such a small hole.
Then he went on to prepare bulk filler. He took a ferrite rod and began to crush it with a hammer in a metal container.
Then he chopped it well with a hammer with a spherical end,
approximately to the state of sand,
and sifted through a sieve.
The result is such a fine ferrite powder.
Then the author mixed this powder with the previously sifted sand in a ratio of one to two.
Mix well and he got a gray powder.
He poured this powder into one of the flasks made earlier from a light bulb.
Then he took a funnel and heated glue on it, using a lighter,
and pasted it into a flask with powder.
He then connected both flasks with a brass sleeve using the same hot glue.
like this.
The author has to make a stand for the watch. He took a wooden block
turned it on a lathe.
He made a recess under the flask in the middle,
then cut off this piece.
and placed a magnet in the center of the recess.
These are not intricate watches that came out of the author.
When the powder wakes up, it is visible how the sand simply lays on the bottom of the flask, and the ferrite is attracted to the magnet thus forming itself as if in small stakes.
It looks very beautiful.