John, you are absolutely correct, Bima is the second of the Pandawa brothers. He is shown as an armourer in the relief of Candi Sukuh among other places.
He has been iconized in many different ways with attribute in his right hand (sword or club) or no attribute at all, he has also been shown with or with out a hair bun and with or without long thump nails, sitting, squatting or standing.
For more information I suggest “Keris-Griffe aus Museen und Privatsammlungen” by Martin Kerner. It is written mostly in German but with some English translations.
Oh John, thanks for the “old boy” attribution
