Trick-de-Luxe-by-Wil-Strijbos

Craftsman: Wil Strijbos
Designer: Wil Strijbos

I managed to track down two bolts of Wil and this is one of them.
As far as I understand this is “Trick de Luxe I” crafted and designed by Wil Strijbos.
If this is wrong in any way or you have more information about Wil’s bolts ie. how to tell them apart, please leave a comment.

This bolt has the following written on it’s “head”: S B E 6.8
(I think it was 6.8 and not 8.8 I don’t have the bolt here right now)
any explanation to what these markings means are appreciated.

I have not started to work on this one just yet. Will update this post after the weekend.

This a behemoth of a bolt… 8cm (3.15 inches) in length.

Update: I got a great explanation from Rudolf O. Roffel regarding the numbers on the bolts

These numbers refer to the strenght of the steel of which the bolt is made.
The range is 3.6, 4.6, 5.6, 5.8, 6.8, 8.8, 10.9 and 12.9 of which the last one is the strongest.
The number before the . is 1% of the bracking strenght in Newton per square mm of material.
The other number behind the . refers to the correspondence of the first number and the point of wich the bolt starts to disform before braking.
12.9 is a rare and expensive one, 3.6 bolts are made from the leftovers of the mill.
It might be that Wil has used these numbers in his puzzle, but these bolts and nuts are always marked with these numbers, expets for the very cheap ones, wich are made from the leftovers from the leftovers