[Art Hoch]

Well I'll be! First one I've seen like that. (Not a Philco expert by any means) I checked the speaker I have which I think is original. (see attached pic) The mounting bracket with holes that apparently would use those bolts, when mounted would align the speaker with the hole in the front of the cabinet.

I wondered why there were no "normal" small bolts around the perimeter of the hole in the speaker board. I was prepared to use some small screws to mount it there. As heavy as that speaker is, the shelf and bolts would be appropriate.

Thanks Ron.