Thanks for the additional photos. What little I can see of the signature does look right, but, unfortunately I cannot see enough of it to be sure. Maybe you could try again?
I have two Selkirk paperweights--one with a name (Seaburst) and one without. Truth is, yours may not have an actual name. Hopefully, though, someone else more familiar with Peter Holmes weights will stop by and add something to this thread.
Good Luck .... Lily
Oh, are there white tendrils around the center bubble in the weight or is that just a reflection I am seeing?