Please see photos. This wheel was used as a spare on my 1941 Series 63. I was planning on mounting 700-15 tires with tubes, when I realized it was 6 inches wide compared to my other wheels which are 5 1/2 inches wide. The wheel does fit my Cadillac, but 6 inches wheel width is not standard for my model.
The wheel does not have retainers for hubcaps.
I recently sanded the interior of the rim to insure there would not be any issues with a tube puncture or a tubeless tire sealing to the rim. I coated the same area with POR-15 rust preventive paint.