Courgette variety

[Digeroo]

I have an extra ordinary courgette plant.  The leaves are very dark green and spotted with very silver spots. I have two possible varieties Mikonos and Cavilli both have green with splogdges on them but they are not the same.  This one is really pretty and nothing like the plants of the others or anything else I have ever grown.  My label says Mikonos but that may not be reliable.  No fruit yet so no idea about that   

I think it is a weed.  Any suggestions as to variety.

Many thanks.

[Digeroo]