OK so it turns out it's not a 9" junior it's actually an 11" SB milling attachment
So with the help of Ted SBLatheman it has been verified that this milling attachment is for an 11" SB and not a 9" Junior as I had suspected it to be, so now before it goes on the ebay as I have no need to have 11" parts when mine is a 9" I will ask again if there are any takers on trading this for the correct 9" milling attachment or a nice collet closer setup. I do have some more pics available and if anybody wants them just let me know.
thank you Ted for your knowledge and help
So with the help of Ted SBLatheman it has been verified that this milling attachment is for an 11" SB and not a 9" Junior as I had suspected it to be, so now before it goes on the ebay as I have no need to have 11" parts when mine is a 9" I will ask again if there are any takers on trading this for the correct 9" milling attachment or a nice collet closer setup. I do have some more pics available and if anybody wants them just let me know.
thank you Ted for your knowledge and help