I am nearly certain it had the pin for the swivel rear jaw. I never attempted to remove it. I haven't been able to match it with any photos of Chas Parker Vises i've seen online. Thanks for looking and replying.
Is there someone that can tell me what model chas parker vise I used to have? I lost my father's vise in an ugly divorce. Number one son took the poor photo. I can not make out numbers. I would like to replace if possible! Thank you.