Ok thanks. In which case they must be the original Sandberg pups.
Just found details of typically used Berg pups from his highness, on a related thread, which is a good summary of the options (although tbf there are a lot of former Delano pup users who would say that the description below is being a little kind i.e. they were sterile / tame. But 'hi-fi' works if one is being too polite which those pups definitely were).
If those had been Black Label pups, I'd have been very tempted to get the VM5 advertised as Bax are currently retailing them for £1,175.