Welcome to the forum, Mickey. I don't have the answer about your chisel, but I suspect one of our other members might.
Stu Ablett, please pick up the white courtesy phone.
Welcome aboard, Mickey. Glad you found us.
Sorry I've been rather busy, about ready to start a huge office renovation over the Oh Bon summer break, 11 days of 12-16 hour days to get the work done, working with three subcontractors etc.
I don't recognize the name right off, but I do recognize quality tools.
Let me do a bit of detective work and get back to you.