Could it be spb i believe it stood for small perfume bottle at OKRA or pbs perfume bottle small. I am sure Mike the Okra man will know more .
We have emailed at length previously to this appearing on this site.
My opinion is that it isn't Okra for many reasons.
1. The base is flat and not a polished concaved.
2. Signature or Okra marks would appear on the polished base.
3. Richard never signed on the body of the item as he says it would always spoil the piece.
4. The letters that are decipherable mean nothing in Okra terms.
5. I cant imagine Richard calling any of his pieces 'Blob'.
6. The stopper look as though it ground to a point which is something else that Richard would not do.
I shall be speaking to him as soon as he is back off holiday to get a definitive answer on the piece.
Regards Mike
www.abfabglass.co.uk