Campagnolo QR skewers ID

[Spiderman]

I have these QRs but I am not sure what era they are.
They are from different eras as the front has a nut to secure the lever.
Are ends consistent with the levers?
http://www.flickr.com/photos/67356568@N05/10696116313/

Thanks for any pointers.
The front does not have a spring in the cam, which I guess it is meant to have. Whiskers say they come with the QR and not separately. Any ideas for a replacement?

 

[agentorange]

Crumbs, quite a mix on those. Curved levers tell us they are mid-late Nuovo Record i.e after 1978, the nut fixing suggests nearer 1978. However the nut ends are later Record (88-92) or maybe Shamal/Vento.

Sorry can't help with spring issue

 

[Spiderman]

Thanks. I thought it was a mixture.