This is how Håtuna Holm got their runestone:
The two brothers Kåre and Håkan lives on Håtuna Holm, a mansion in the community of Bro, a couple of miles north of Stockholm. The older brother Håkan were about to turn 50. Kåre, the younger brother, had an idea for a present...

Some time ago Håkan had found a rock out on the field that looked like a real runestone. He'd let it be reised on his own land as if it had been a real runestone. Now that Håkan was about to turn 50, Kåre stole the stone, covered the hole with 
branches and sticks and shipped the stone to have it carved.

Together we came up with a suithing Runinscription:
Håkan on Håtuna 50 years, many things he did.
Friends raised the stone. Kalle carved.

I thought that I had plenty of time to finish the work 
in the cold although the stone was "rockhard", and 
chimed like a bell every time I hit the surfice.

But suddenly Kåre calls me and says: My brother 
has just discovered that the stone is gone, he's furious 
and went to the police to reported the stone stolen. 
You have to finish the stone so that we can have it 
brought back here as soon as possible.

You heat up your tools on the stove and put them 
in a mitten. When the tools you are working 
with gets cold you change to the ones that are 
hot and nice from the mitten.

There are no numbers in the Futhark, so used 
roman numbers instead. 50 was carved with an L

Today the stone stands raised on Håtuna Holm, and next to 
it stands a sign with a description of a runestone that's a bit younger than usual.

This I know because I was there a hot summers day in 1996, a much warmer day then when the runestone were to be carved.